WHAT DID I DO (weird electrical issues)

[High Five H2]

Last night I washed my H3 and then installed an HID kit. I washed under the hood pretty well because I'm trying to identify some leaks as well. As soon as I drove off, my windshield wipers turned on and I couldn't turn them off. I got home, installed the HIDs and went to bed. This morning, the wipers are turning on every 20 seconds or so, and that's it. By the time I get to work, if I make a sharp turn, they turn on constantly for 10-20 seconds. Then, it started giving me a warning for my stability system.

I don't think it's related to my HID system, but I don't want to rule that out. One of them wasn't working so maybe there's something there. I tried to avoid the BEC (fusebox) but I suppose some water got in there. Could that give me these kind of issues?

 

[Kyle]

if water got into your fuse box the fuses would pop (hopefully), id start buy opening it up and letting it air out, check for moisture too.

 

[rascole]

I had a similar issue with my Silverado, the wiring connected to the multifunction switch (the turn signal/wiper control) had started to fray and was shorting out. Took awhile to figure it out but it had the same issues as you and a easy fix.

 

[High Five H2]

OK, I just drove it to get lunch and it wasn't being weird. I'm going to open up the BEC and let it air out later just in case.

I'll probably check the stalk, too, just to be sure.

thanks everyone.

 

[derian06]

I had many weird things happen when installing an HID system without a proper relay. You can always check by disconnecting the hid's and seeing if the problem persists.

 

[High Five H2]

I think it was just a wet BEC. I haven't had any issues for a while.

 

[vader2]

I just had to have my BCM replaced. Started with the same issue - the wipers every few seconds. The passenger front sunroof drain came unhooked at the firewall and the water ran down the harness straight into the bcm.

 

[High Five H2]

That's not good, I hope that's not the issue with mine.

 

[4speedfunk]

The passenger front sunroof drain came unhooked at the firewall and the water ran down the harness straight into the bcm.

I know an H3T Alpha guy that had this same issue. Smoked BCM from rainwater.

 

[High Five H2]

It's been fine, but I went over some pretty deep potholes and for a few seconds after I had some electrical glitches. I'm thinking my BEC still has a bit of water in it and it got spread around when I went over the bumps. I'll check the BCM just to make sure, though.

 

[High Five H2]

Update: I took my BEC out and made sure there was no water or corrosion. I checked all the fuses. The trailer brake fuse was out and one diode looked like it had corrosion. I checked it with a multimeter and it was fine. I swapped the diodes (one is for wipers, the other is for A/C). The wiper one looked like it had a bit of corrosion or like it had gotten burned or something. I put it in the A/C spot, and my wiper issues mostly went away.

I figured maybe the diode was bad, so I ordered a new one and put it in. Now the wiper issue is even worse. My wipers come on when I start it and stay on for about 5 minutes. I can't use my turn signals or windshield cleaner spray or climate controls. After that, if I turn it to setting 1 or 2, when the wipers come on and wipe 3 times and then turn off. If I turn it to setting 4 or sometimes 3, then the wipers come back on and won't turn off for a few minutes.

I'm thinking now that the BCM is bad, considering how sporadic the problems are. I had to do it, but I may just have to take it to the dealer since diagnosing electrical issues is over my head.

 

[High Five H2]

I dropped it off at the dealership 4 weeks ago (today!) and they still haven't figured it out, but they also still haven't checked out the BCM. The tech said they would have to swap it out for a new one to test if the old one is bad, and they don't want to order a new one.

Is it just me, or is that retarded?

 

[chaos254]

Have you read this post? Sounds exactly like your issue http://www.hummer4x4offroad.com/forum/showthread.php?t=7558

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[High Five H2]

So it's been just over 6 weeks. They put in a new fuse box, which took 2-3 days longer than they said it would take, and the problem is "95% solved," according to the guy at the dealership. They've told me that they checked the BCM, and one guy said that they never checked, this guy said they did... I think I'm never going to see it again. I'm just going to make payments on a car that I talk to a guy on the phone about once a week.

 

[High Five H2]

I finally got it back. They found corrosion on the connectors underneath the fuse box. They replaced the fuse box, which cost nearly $400 (!!!). That solved 90% of the issue. Then they were able to use the LAN to track down some wires that go to the ECU that were rubbing on the fender. The tech fixed those and no issues now.


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[High Five H2]

Total out the door was $1261. Could have been worse, I suppose.


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