Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
having an issue here. came to as a no crank and can bus codes. found fuse for tcm blown. can talk to it now. fuse pops intermittently when going into reverse. when i could get it to act up where itd happen all the time i unplugged the trans range sensor and fuse stopped blowing. so i put in new sensor 4 days later doing it again. this time i cut the orange wire at pin 5 going to the reverse lights lasted 6 days. anybody seen this before. i might unplug every thing on that circuit and checkfor a short to ground. next time it happens i want to unplug the connector at the transmission solenoids see if the short goes away when its acting up
I wonder if the shifter being movedhas anything to do with it, like theres wires being pinched somewhere. if its blowing a fuse, its either a circuit overload by excessive amp draw or a direct short. you need to identify ALL wires in the circuit and physically trace them down.
sounds like you wiill have to start at the fuse, and find every wire that is on that circuit. draw with a highlighter on the wiring diagram.check each one for short to ground . it sounds like theres a wire rubbing to a ground somewhere. does it happen more when its damp outside or on bumpy roads?
this is a heck of alot of stuff on a 10 amp circuit, looks like an engineering snafu..
49 10 Back-Up Lamp, BCM (Body Control Module), CVT Control System, Engine Control System, Intelligent Key System/Engine Start Function, NVIS, Power Distribution System, Navigation System, Starting System
if every different system on that circuit were fused, you could see exactly where its happening ... . exactly what codes was it throwing,? what numbers.
what scanner are you using, can u access event data?
not throwing any codes. it just loses communication with the tcm then the gear shifter indicator disapears on the dash. when shut off it becomes a no crank. it hasnt blown this week yet.
Was the part u replaced OEM? been hearing of alot of issues with electrical parts in the aftermarket not cutting the mustard. with a circuit that stacked, in sure there isnt much room for variances.
I dont understand how they can have the starter and transmission, on a 10 amp fuse, along with everything else. have u found where this circuit grounds? I believe a poor ground can cause an amperage spike
Water can't make anything short out! (it can cause corrosion however but certainly can't make a short)
Try fitting a "short light". Remove the fuse and wire up a headlight bulb bright beam circuit to it (the two furthest apart on the bulb), insert a wire in each side of the fuse holder MAKING SURE THEY CAN'T TOUCH! .
Your bulb becomes your fuse except it doesn't blow, it just goes bright when there is a short. if you're lucky and it stays bright when the short is there (it could go off as everything else loses power) you can trace the current using a clamp meter, or simply go and move things around and unplug things until it goes off - then you have located your short.
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