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Chevrolet Suburban Electrical Problems

5 messages,  Last post on Dec 07, 2009 at 9:59 AM

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#1 of 5 Suburban brake light stays on & p/w, speedometer, A/C won't work by julieyet Nov 01, 2009 (8:46 pm)
Hi,   I'm hoping you guys can help. I have a 1991 Chevy Suburban. I was driving it a week ago, when all of a sudden the brake light came on (and stayed on), the A/C shut off, the power windows wouldn't work, and the speedometer went all the way to zero (and stayed there).   Things stayed this way for a few days. Then, one day when I went to start it, the brake light was NOT on, and everything that had stopped working was working again. Later that day, when I went to start it, the light was back on and the A/C, windows and speedometer had stopped working.   It seems to go back and forth. Sometimes it'll work, and sometimes it won't.   Any ideas at all what we should check?   Thanks in advance! Replies to this message: kiawah (Nov 02, 2009 6:26 am) nyboy1 (Nov 03, 2009 11:18 am)
#2 of 5 Re: Suburban brake light stays on & p/w, speedometer, A/C won't work [julieyet] by kiawah Nov 02, 2009 (6:26 am)
Replying to: julieyet (Nov 01, 2009 8:46 pm) When coming across flakey symptoms like you have, I always start by making sure that the basic power is clean and stable. Have the battery and alternator load tested at a parts supply house, this is usually a free service. Pay particular attention to the battery connectors, looking that they are tight, and free of corrosion on the connector and up into the wire.   You should also check the ground wire connection, to make sure you don't have a loose (or high resistance ground).   If those check out, then I would follow the power to the main fuse box, and check your voltage on the main buss, to make sure you aren't dropping any voltage from where the battery voltage is sitting at. You'll need a digital voltmeter, they can be picked up reasonably priced at a radio shack or auto parts stores.
#3 of 5 brake light and bat stays on & p/w, speedometer, A/C won't work [julieyet] by nyboy1 Nov 03, 2009 (11:18 am)
Replying to: julieyet (Nov 01, 2009 8:46 pm) hi i m having the same problem on my 2004 tahoe all of a sudden the abs light came on and the battery light then none of the instruments clusters where working the A/C is blowing hot air the windows are not working and the door locks are not working and it wouldn't respond to the key fob. the dome light stoped working. i checked all the relays they all seem in a working condition i don't know what to do next. if anybody have any suggestions i would highly aprecciate it thx
#4 of 5 Also Electrical Issues by bigmomma2 Nov 11, 2009 (5:55 pm)
My 2000 Suburban began with the Low Coolant light being on continuously. 1700.00 later the Check Engine Oil Level light came on for 2 weeks. That sensor is fine and the oil level is fine. Now the lights are both switching on, first the low coolant then the oil level light, one after another, after another, after another. Mechanic is saying it is electrical issue. Anyone have any ideas before I start screaming and have to be committed?
#5 of 5 2004 Suburban electrical problems by hatchel8 Dec 07, 2009 (9:59 am)
I have a 2004 Suburban that out of the blue this weekend started giving me extremely loud feedback through the speakers... even when the car was off, radio fuse removed, radio/stereo off, etc. It was bizarre and is so loud inside that you can't stand to be in the car for any reason. In the past, we've had the a/c get stuck on extremely hot heat and also the auto locks flip back and forth while driving down the road but no one seems to be able to fix it. Now on those brief moments when it's not so loud from the feedback you can hear a sizzling in the dash board. Waiting on a mechanic to tell me if there are electrical problems for sure. Anyone experience anything similar?

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