CEL will not illuminate with known malfunction codes

My son bought a 2006 Tundra V8 4.7L a few weeks ago and when he took it in to emissions CEL wouldn’t light up with key in on position. Immediate fail so I suspect that the instrument cluster wiring had been tampered with. Took the instrument panel apart, following excellent procedures I gleaned from this forum, and found a single wire cut on the left hand bundle. How can I check if this is indeed the wire for the CEL. My initial thought was to go to dealership and have them check out the problem not knowing how in-depth the fix may be. Any thoughts on this matter. Thanks in advance

 

Just get yourself a butt connector and reconnect the wire.

This is, unfortunately pretty common for crooked people to either trade in their car or the shady dealer/car curbers will do the same.

Save yourself a trip to the dealer, who will charge you a fortune.

 

Not familiar with a butt connector. Also there is no wire coming out of the pin connector

 

https://www.tundras.com/threads/ultimate-tundra-wiring-diagrams-collection.81448/

 

Ah, I was under the impression that you found a clipped wire.

A butt connector is the standard connector you use for installations and repairs in vehicle wiring.

did you look for electrical tape over the light?

 

The MIL should be part of the 40 pin connector C5 18....the Violet(purple) w/White tracer.
The only white I see is the one for Memory Seat ECU....C5 pin 30.
Has that white wire have a tracer wire ?





Also, if you have a volt ohm meter or equivalent tester, turn key to IGN ON only and at same time see if there is 12vdc at C5 pin 18.

 

Thanks so much Bubba