- Mar 22, 2023
- Reaction score
Hmmm - yes I have a receipt from O’Reilly’s for spark plugs (8) and an ignition wire. I do not have a receipt for spark plug wires but was billed for them but not for the ignition wire. Go figure.I am no engine expert but did this "technician" replace your spark plugs and wires for you? Newer engines with high-energy ignitions need resistor spark plugs, electrical noise/interference may affect surrounding sensors. (like knock sensors). Just a thought.
Check your schematic, the radio and instrument panel might share a common ground inside the dash somewhere, it may be loose, corroded or broken.
I will check to make sure they are appropriate for my Yukon.
Am studying the diagram(s) to find the ground locations for the radio an instrument panel lights.
no radio and cluster dim could reflect a poor connection somewhere, where exactly is the tricky part. most commonly it's the ground to the battery.
I would ohm check the ground cable as a place to begin. from "negative battery post to ground point on engine block/head" it should read 0.00
you may have a smaller cable that also splits from the main ground cable and goes to the frame check that as well.
on the back of the engine I think drivers side there is a ground strap there as well it can be difficult to reach you may want a stool or something to give you a lift up.
I know you said you checked the grounds before but a ohm test will confirm they are good