Hi all. Long time, no post. I have an '09 Pontiac Vibe GT (or, Toyota Matrix XRS) 2.4L with a strange issue.
The 10amp (ECU-IG NO. 2) Back-up lights, charging system, rear window defogger fuse blows when I turn the key “on”, but sometimes shortly after it is started. It blew yesterday while I was driving (or I just noticed it while driving, may have blown on startup) and now blows consistently.
Oddly, this happened about a year ago and simply replacing the fuse worked, but not after I needlessly replaced the alternator and messed around with the neutral position switch and disconnected/reconnected some stuff down there (Had a related P0705 Transmission Range Sensor Circuit Malfunction code and the alternator was only charging at 11.7 volts - both of which were resolved with a new fuse.)
My guess now is that I accidentally “fixed” it back then by messing with the neutral position switch. I should mention that I recently replaced my radiator, which required a lot of knocking around in the tranny area, but that was about a month before the fuse blew.
I couldn’t find any damaged wires or loose connections around there (or anywhere else).
The fuse in question is also associated with the charging system and rear defogger, but I disconnected the low voltage alt cable and the defogger switch in the dash, and it still blew.
Any ideas?
Thanks in advance,
Jonas
A fuse blew in one of my pickup’s circuits. I cut every line before I found it was for the light in the glove box - which the pickup doesn’t have. (But the Forerunner does - uses the same harness.) I found no obvious problems. In other words I offer only a counsel of despair.
Sounds like you are going to need a wiring diagram and start looking at every circuit connected to that fuse and probably have to start with one circuit at a time and disconnect it from the end all the way back up to the fuse, that could include relays and module(s) etc…
And check ALL your fuses, OEMs do some crazy things sometimes…
2 Likes