Wiring Puzzle

[SDBridger]

Hi
I have a low hour T474 with Cab.
Ive suddenly lost power to the Sterio and gauge cluster for wipers and front/rear spot lights. But still have functioning Heat/AC also ceiling mount controller.

I hit a bump, and all came back on..
Hit another bump, yup.. off the 2 went again.

The mystery is that I've chased ground to each controller- (good)
Chased power wire to both controllers and getting 12v to both harness plugs.

After 12 hours of chasing wires, im considering a 5 gallon jug of gas and a match!!

Any advice would sure be appreci5

Thank you

 

[alexpops]

Sounds like a break in insulation & intermittent short or a broken wire that sometimes lets the electrons flow so intermittent open. Nothing to do but trace the circuits or see if a power probe can help determine the general area in the harness where the problem is occurring. Any mouse sign? Depending on how the stereo is related to the gauge cluster you may want to check for common grounds or feeds in the dash as well. Not sure if they use circuit boards in those circuits but if so, could be some cold solder joints on the board.

If under warranty, & you have something else to use (or don't need) maybe let the dealer waste their time tracking. Not economical if your warranty is up.

 

[ptsg]

Check the fuses for any loose one. Sometimes the terminals on the fuse block aren't tight enough and the fuse pretty much loose in the fuse box causing all kinds of weird behavior.

 

[Torvy]

...and welcome to TBN and our little TYM family.

 

[oldnslo]

My advice: Move the tractor outside before striking the match