1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site
    Quick Links: Fridge/freezer setup for overlanding Casual Observation Next project. Stereo and speakers Rear diff fluid type and brand with lsd 2005 DC 8Cyl Spark Plug discrepancy Drivers seat is loosing support after 17 years...

Voltage Spike

Discussion in '1st Gen Tundras (2000-2006)' started by faviles, Feb 27, 2019.

Page 2 of 3
  1. Mar 7, 2019 at 6:06 PM
    #31
    Festerw

    #31
    Festerw New Member

    Joined:
    May 7, 2017
    Member:
    #7600
    Messages:
    3,880
    Gender:
    Male
    Cambridge Springs, PA
    Vehicle:
    04 Tundra DC
    These guys.

    Usually it's pretty obvious if they're worn out but they sometimes stick in the holders.
    [​IMG]
     
    This site contains affiliate links for which the site may be compensated.
    Festerw, Mar 7, 2019
    #31
    faviles[OP] likes this.
  2. Mar 7, 2019 at 6:08 PM
    #32
    faviles

    #32
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Okay thanks that's what I was thinking. I saw it but didn't play around with it. I'll check it out tomorrow...
    Anything I should be looking for in telling me that it's bad besides the sticking?

    And I'll get actual pictures of it this time around.
     
    This site contains affiliate links for which the site may be compensated.
    faviles, Mar 7, 2019
    #32
  3. Mar 7, 2019 at 6:10 PM
    #33
    Aerindel

    #33
    Aerindel New Member

    Joined:
    Jan 31, 2019
    Member:
    #25399
    Messages:
    1,657
    Gender:
    Male
    Montana
    Vehicle:
    2000 Tundra AC, SR5, 4.7 V8 4WD, 325,00ish miles.
    I still think its the alternator failing and the regulator was just part of the problem.
     
    Aerindel, Mar 7, 2019
    #33
  4. Mar 7, 2019 at 6:12 PM
    #34
    Festerw

    #34
    Festerw New Member

    Joined:
    May 7, 2017
    Member:
    #7600
    Messages:
    3,880
    Gender:
    Male
    Cambridge Springs, PA
    Vehicle:
    04 Tundra DC
    Last edited: Mar 7, 2019
    Festerw, Mar 7, 2019
    #34
  5. Mar 7, 2019 at 10:01 PM
    #35
    remington351

    #35
    remington351 New Member

    Joined:
    Dec 18, 2018
    Member:
    #23214
    Messages:
    464
    Gender:
    Male
    Vehicle:
    2006 SR5 DoubleCab
    Thanks for the update. I enjoy when people update their threads with results...helps all of us learn.

    Grounding points.jpg

    Grounding points body.jpg
     
    remington351, Mar 7, 2019
    #35
    Professional Hand Model, faviles[OP] and bmf4069 like this.
  6. Mar 8, 2019 at 7:24 AM
    #36
    faviles

    #36
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Here's another update:

    Took it to AutoZone, had everything tested within the car. Battery was fine, starter was fine, alternator voltage regulator failed...

    Before I give up and just buy a new alternator, I'm gonna hit those grounding point with a wire brush.

    The only thing I see is that compared to my 2001 V8, that diagram looks a little different. Some points are missing on there that I see on my car such as the one attached to the firewall.

    After cleaning the connections and the problems still there, then new alternator it is!
     
    faviles, Mar 8, 2019
    #36
  7. Mar 8, 2019 at 7:35 AM
    #37
    FirstGenVol

    #37
    FirstGenVol Recovering mangler

    Joined:
    Dec 13, 2018
    Member:
    #22934
    Messages:
    14,175
    East TN
    Vehicle:
    2002 AC TRD 4x4 V8
    Frank, your truck is 18 years old. I would put a new alternator on it unless you're about to sell the truck. Why keep messing with an 18 year old part that is likely to fail at some point anyways?
     
    FirstGenVol, Mar 8, 2019
    #37
    osidepunker and faviles[QUOTED][OP] like this.
  8. Mar 8, 2019 at 7:39 AM
    #38
    faviles

    #38
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    No I definitely do not want to sell it. I love it even with the small issues it has.

    The alternator is not the original one, PO replaced it. I don't know how old the current one is. But I do agree with you, after cleaning the grounds for peace of mind, I'll just buy a new one and update the post.
     
    faviles, Mar 8, 2019
    #38
    G_unit3000, speedtre and FirstGenVol[QUOTED] like this.
  9. Mar 8, 2019 at 7:49 AM
    #39
    FirstGenVol

    #39
    FirstGenVol Recovering mangler

    Joined:
    Dec 13, 2018
    Member:
    #22934
    Messages:
    14,175
    East TN
    Vehicle:
    2002 AC TRD 4x4 V8
    Oh I see. I just assumed it was the original one. I wonder if the PO went cheap on the replacement? Keep us posted on what you end up doing.
     
    FirstGenVol, Mar 8, 2019
    #39
  10. Mar 8, 2019 at 9:16 AM
    #40
    faviles

    #40
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    20190308_114255.jpg 20190308_114233.jpg

    There is the alternator opened. Took me 10 mins to get her out, I'm an expert alternator remover now haha.

    Cleaned the grounds as well, but didnt see anything too compromising, so I'm biting the bullet and I'm on my way to either advance auto or autozone.
     
    faviles, Mar 8, 2019
    #40
    Jack McCarthy and bmf4069 like this.
  11. Mar 8, 2019 at 9:24 AM
    #41
    FirstGenVol

    #41
    FirstGenVol Recovering mangler

    Joined:
    Dec 13, 2018
    Member:
    #22934
    Messages:
    14,175
    East TN
    Vehicle:
    2002 AC TRD 4x4 V8
    WAIT!

    If You order online at Advance Auto with code REFUND you can save 20%. Good through the 10th.
     
    FirstGenVol, Mar 8, 2019
    #41
  12. Mar 8, 2019 at 9:27 AM
    #42
    faviles

    #42
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Lol I used the coupon25 code 25% actually with the in store pick up option. But thank you!
     
    faviles, Mar 8, 2019
    #42
    FirstGenVol[QUOTED] likes this.
  13. Mar 8, 2019 at 9:30 AM
    #43
    FirstGenVol

    #43
    FirstGenVol Recovering mangler

    Joined:
    Dec 13, 2018
    Member:
    #22934
    Messages:
    14,175
    East TN
    Vehicle:
    2002 AC TRD 4x4 V8
    Good deal. I never pay full price there. They send me coupon codes every week.
     
    FirstGenVol, Mar 8, 2019
    #43
  14. Mar 8, 2019 at 11:56 AM
    #44
    faviles

    #44
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Replaced the alternator, same issue. Unsteady needle on the battery gauge and the red battery light still pops on...

    What. The. Hell.

    On my way back to advance to get this one tested as well...
     
    faviles, Mar 8, 2019
    #44
  15. Mar 8, 2019 at 11:58 AM
    #45
    FirstGenVol

    #45
    FirstGenVol Recovering mangler

    Joined:
    Dec 13, 2018
    Member:
    #22934
    Messages:
    14,175
    East TN
    Vehicle:
    2002 AC TRD 4x4 V8
    I'm just impressed with how fast you're able to install an alternator. I've heard it's not that easy on our trucks. Apparently you're a pro!
     
    FirstGenVol, Mar 8, 2019
    #45
    15whtrd likes this.
  16. Mar 8, 2019 at 12:05 PM
    #46
    faviles

    #46
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Haha, I'm just happy it's not that difficult. Otherwise this would suck a lot more.
     
    faviles, Mar 8, 2019
    #46
    15whtrd likes this.
  17. Mar 8, 2019 at 12:13 PM
    #47
    Festerw

    #47
    Festerw New Member

    Joined:
    May 7, 2017
    Member:
    #7600
    Messages:
    3,880
    Gender:
    Male
    Cambridge Springs, PA
    Vehicle:
    04 Tundra DC

    New or reman unit? If it's a reman get the replacement tested before you walk out of the store.
     
    Festerw, Mar 8, 2019
    #47
    15whtrd likes this.
  18. Mar 8, 2019 at 12:27 PM
    #48
    Mike

    #48
    Mike Tread lightly.

    Joined:
    Jan 13, 2014
    Member:
    #87
    Messages:
    3,638
    Gender:
    Male
    First Name:
    Mike
    south carolina
    Vehicle:
    2003 tundra sr5 4x4 stepside....
    yep bank account is running low from it..
    Almost sounds like the battery connections as going bad or dirty..
     
    Mike, Mar 8, 2019
    #48
  19. Mar 8, 2019 at 12:56 PM
    #49
    faviles

    #49
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Remanned. Went back and the employee told me it's over charging at around 15.5v. He also said it could be some loose connections or the way my battery terminals are connected. But if I wanted to I could exchange this one tomorrow when they ordered a replacement.

    Before leaving he also mentioned that it could be that I'm using the 100amp alternator instead of the 70amp, which reading through here wouldn't make sense, right?

    The car is also shaking a bit at idle now, don't know if it has to do with any of this...

    Here is a pic of the battery connections.

    15520785237693213629297049501389.jpg
    15520785608335089355504349565738.jpg
     
    faviles, Mar 8, 2019
    #49
  20. Mar 8, 2019 at 1:07 PM
    #50
    Festerw

    #50
    Festerw New Member

    Joined:
    May 7, 2017
    Member:
    #7600
    Messages:
    3,880
    Gender:
    Male
    Cambridge Springs, PA
    Vehicle:
    04 Tundra DC
    Looks like the crimps could be a little better but I've had 3 reman Advance alternators go bad within months, one tested bad right out of the box at the store.
     
    Festerw, Mar 8, 2019
    #50
  21. Mar 8, 2019 at 1:52 PM
    #51
    Mike

    #51
    Mike Tread lightly.

    Joined:
    Jan 13, 2014
    Member:
    #87
    Messages:
    3,638
    Gender:
    Male
    First Name:
    Mike
    south carolina
    Vehicle:
    2003 tundra sr5 4x4 stepside....
    yep bank account is running low from it..
    Those crimps need to be redone honestly ground to that battery needs a connection on it.. you can have high resistance there.
     
    Mike, Mar 8, 2019
    #51
  22. Mar 8, 2019 at 2:04 PM
    #52
    faviles

    #52
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    What do you mean by the ground to the battery?

    I tested grounds by following this video. It seemed within the specs that this guys says.

    https://youtu.be/1bK0De9XOP0

    I got .01v between both connections (+) on metal of alternator and (-) on negative battery post.
     
    faviles, Mar 8, 2019
    #52
  23. Mar 8, 2019 at 2:35 PM
    #53
    Mike

    #53
    Mike Tread lightly.

    Joined:
    Jan 13, 2014
    Member:
    #87
    Messages:
    3,638
    Gender:
    Male
    First Name:
    Mike
    south carolina
    Vehicle:
    2003 tundra sr5 4x4 stepside....
    yep bank account is running low from it..
    Ground on the battery is bare wire that is just tighten down.. that's not a solid connection. Like I said all those battery connections need to be redone the correct way. I believe Auto and advance both sell the tool for proper crimp tool with that gauge wire. Then use a jacket where the crimp.
     
    Mike, Mar 8, 2019
    #53
    faviles[OP] and NewImprovedRon like this.
  24. Mar 8, 2019 at 3:50 PM
    #54
    Markman

    #54
    Markman New Member

    Joined:
    Nov 21, 2018
    Member:
    #22001
    Messages:
    101
    Gender:
    Male
    First Name:
    Mark
    Utah
    Vehicle:
    2019 limited cement cm
    Tint airbags daystar cradles Elka suspension bushwacker flares
    I agree with Mike no offense but those connections are awful. Spend the money and buy premade battery cables, it is hard to make a good connection to the battery terminal without a highpress. If those connections are not your problem the will be in a few months corrosion will start very quickly. I have fixed lots of weird intermittent problems just by starting right at the source. Hope that helps
     
    Markman, Mar 8, 2019
    #54
    TX-TRD1stGEN and faviles[OP] like this.
  25. Mar 8, 2019 at 4:04 PM
    #55
    Festerw

    #55
    Festerw New Member

    Joined:
    May 7, 2017
    Member:
    #7600
    Messages:
    3,880
    Gender:
    Male
    Cambridge Springs, PA
    Vehicle:
    04 Tundra DC
    Festerw, Mar 8, 2019
    #55
  26. Mar 8, 2019 at 4:41 PM
    #56
    faviles

    #56
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    No offense taken guys, the car came that way from the PO haha. I just bought a new negative terminal as the old one was heavily corroded. I'll replace them too.
     
    faviles, Mar 8, 2019
    #56
  27. Mar 8, 2019 at 5:05 PM
    #57
    Markman

    #57
    Markman New Member

    Joined:
    Nov 21, 2018
    Member:
    #22001
    Messages:
    101
    Gender:
    Male
    First Name:
    Mark
    Utah
    Vehicle:
    2019 limited cement cm
    Tint airbags daystar cradles Elka suspension bushwacker flares
    Cool keep us posted !! And let’s see some pics of that truck!!
     
    Markman, Mar 8, 2019
    #57
  28. Mar 9, 2019 at 10:53 AM
    #58
    faviles

    #58
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Update:

    Decided to check some wiring between the battery and the alternator with my voltmeter, here's what I got with the car switched on.

    Battery: 12.3~v (kinda low right?)

    Alternator: (this is with the negative probe on the negative terminal on the battery)
    Power Post: 12.3v
    Unhooked connector and tested pins...
    White wire: 12.2~12.3v
    Indigo wire: 12.13v
    Green/Yellow wire: 11.8v (a little off but this is only for the guage cluster I believe)

    Taking a lunch break now and afterwards I'm going to take the alternator back out and bench test it at AutoZone myself since I used to work there and am still close with the manager.

    I also plan on buying what I need to redo those terminals...

    Be back in a few!
     
    faviles, Mar 9, 2019
    #58
    Markman and bmf4069 like this.
  29. Mar 9, 2019 at 2:36 PM
    #59
    faviles

    #59
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Alternator passed... did the test three times.

    Fixing the battery terminals now.
     
    faviles, Mar 9, 2019
    #59
    NewImprovedRon, bmf4069, Professional Hand Model and 2 others like this.
  30. Mar 10, 2019 at 2:17 PM
    #60
    faviles

    #60
    faviles [OP] New Member

    Joined:
    Nov 20, 2018
    Member:
    #21951
    Messages:
    82
    Gender:
    Male
    First Name:
    Frank
    Vehicle:
    2001 Red Tundra SR5 TRD
    Stock for now
    Can someone confirm that a 100 amp alternator instead of the 70 amp shouldn't be causing these troubles?
     
    faviles, Mar 10, 2019
    #60
Page 2 of 3
Register FREE to Reply!
To Top