Last post on Mar 25, 2013 at 5:45 PM
You are in the Chevrolet Blazer
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Chevrolet, GMC Jimmy, SUV
#57 of 607 Re: 2001 Chevy Blazer: Electrical Problems [firstshirt1sg]
Jan 27, 2007 (5:41 am)
Blazers 3/2000-6/2001 manufacture dates had an NHTSA recall ID#01V36400 on like a half million vehicles for the multifunction switch developing an open circuit in the harzard carrier results in only the top mounted brake light working. Dealer installs gm kit #15174447 in a few minutes by pulling that harzard switch part out with pliers (have to get it all) and inserting a new one. Free if in the year span so GM can run your VIN and tell you.
#58 of 607 About those windshield wipers ...
Jan 30, 2007 (1:58 pm)
GM had a problem with all of their models regarding the intermittent start/stop of the wipers. Because of my background, I decided to do an RCA (root cause analysis) of the failure and see what was going on once and for all. Here is what I found:
The wiring harness to the circuit board is not supported. Because of this, movement occurs during driving that applies vibration and stress to the connector on the circuit board. If you have the described problem, remove the harness, then the circuit board, and look closely at the solder joints of the connector. In every case of this happening (and I have seen many) I found small hairline fractures in the solder connections. In each case, the solder was removed and the solder pads cleaned. Then, using a rosin core solder, the harness connector was resoldered to the board. The board was reinstalled and the harness plugged back in. Then, I took a tie wrap and secured the harness to the firewall so that it could no longer move around and flex the connection to the board.
This repair has been done on dozens of GM trucks, cars, and vans and the problem was corrected in each case. By securing the harness, the problem has not recurred.
And it is a lot cheaper than replacing the board!
#59 of 607 Re: About those windshield wipers ... [jlflemmons]
Jan 30, 2007 (4:01 pm)
I had the same problem with my '98 Blazer. I switched out the wiper control pulse board for about $30 and it fixed the problem. Not too hard to do - remove the 4 screws holding the housing together and the board comes right out. You need to get silicon sealer and seal around the cover when you put it back on to keep moisture out. The housing is located towards the drivers side against the firewall in the engine compartment and has wiring coming out the side. I didn't know about securing the harness - I'll do that to prevent future problems - Thank You.
#60 of 607 Re: About those windshield wipers ... [david565]
Jan 30, 2007 (5:56 pm)
You are right, changing the board is not hard to do on most GM products. Now, those dustbuster vans (Olds, Chevy, Pontiac) were a little tricky as the wiper motor is way up in there.
I had just seen and heard about so many of these failures that my curiosity got the best of me and I had to figure out what was going on.
#61 of 607 89 Blazer S-10 electrical problems & more!!!
Feb 03, 2007 (10:59 pm)
Hi I am new here I am not a mechanic obviously and I am having some problems. I keep blowing a fuse on my Blazer, when I first start it. I took it in to a repair shop when it would not start after a cold spell. I thought it was a timing belt. Turned out to be a fuse for the fuel pump, pump was checked out and it was ok. And a fouled spark plug. About 5 days later it started it blowing fuses. It would start and run and then the next time it would blow a fuse.
I had the heater switch replaced before the fuse problem began. Now the heater is not working at all. Please help, thanks.
Feb 03, 2007 (11:11 pm)
my brother and i just repaced the left wheel hub assembly, being newbies we did it in about 4 hours with a few trips back to the auto store for a 18mm square wrench,hub puller,and rental on a socket set for the torque wrench(cannot be rented)all in all it went better than expected, no vibration at source. A curious thing happened afterward. i left the keys in the ignition and killed the battery. keys would not release from the starter and would not start even after jumpers. we cleaned the terninals, should i be looking for something else other than my auto club card.i mean no power at all..very wierd. please write back with ideas. and has anyone used nu-lense..if so does it really work
#64 of 607 Re: 89 Blazer S-10 electrical problems & more!!! [tomjan79]
Feb 04, 2007 (5:09 am)
Either you have a shorting wire somewhere in the vehicle that you have to track down or the fuel pump is failing and drawing too many amps so fuse blows. Check fuel pump relay or replace and make sure all connections are clean at fuses and pump - corrosion causes more resistance thus amps increase so fuse blows. Check the vac lines under hood for the heater, then heater core, temp running normal (thermostat), and blower working.
#65 of 607 Re: total powerloss [nujimmyowner]
Feb 04, 2007 (5:16 am)
Never said year or model but would say the Passlock security system was activated. Older ones have special keys and newer do not but shuts off ignition. Try turning the key off with the battery connected, remove battery cable again and see if key comes out. Then with key out connect battery - did it work. If the security light continues to flash after 5 sec when key is turned to run thats passlock (should go out like other dash warnings).