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Chevy Blazer GMC Jimmy Electrical Problems

472 messages,  Last post on Nov 19, 2009 at 4:18 PM

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#456 of 472 Re: '00 Jimmy - Something's draining the battery [edortizr6] by jlflemmons Oct 27, 2009 (8:20 pm)
Replying to: edortizr6 (Oct 27, 2009 10:17 am) Be sure to check that the cables are clean and tight at the battery, and also be sure the ground cable is clean and tight on the other end, usually to the engine block. If you can find a digital voltmeter, check the battery with the engine off. If within 30 minutes the voltage drops more than one tenth of a volt, something is drawing more power than it should. For process of elimination, you can pull fuses and see what stops the voltage drop.   If the car has power until you try to start it, and then all power is gone, double check all your connections to the battery and engine. Here again, a volt meter is invaluable. It will tell you if the battery still has power, but is not getting it to the vehicle, ie bad connection.   Good luck!
#457 of 472 Re: 1992 GMC YUKON WIPER MOTOR HAS HIGH ONLY [buster1155] by cardoc50 Oct 28, 2009 (7:34 am)
Replying to: buster1155 (Oct 26, 2009 5:43 pm) You definately have a short in the wiring somewhere between the fuse panel and the wiper motor assembly. You need a wiring diagram for your vehicle. You can buy a repair manual from your local parts store. In the back of the book you will find the diagrams.I wonder how you went through so many related parts and you never mentioned having a blown fuse.In the diagram you will find the routing of the wiper related wiring. Sometimes the wiring will go through other unrelated parts other than the one you have problems with. I suggest you get the diagram and start from the fuse panel.Sorry I can't pinpoint the exact problem but I hope you may use something I may have said to help you fix your problem. Good luck! Replies to this message: buster1155 (Oct 28, 2009 8:00 am)
#458 of 472 Re: 1992 GMC YUKON WIPER MOTOR HAS HIGH ONLY [cardoc50] by buster1155 Oct 28, 2009 (8:00 am)
Replying to: cardoc50 (Oct 28, 2009 7:34 am) Thanks, I went to dealer ship yesterday and got a print out or wiring harnness and pin pointed wiper wires #91, #92, #93. Talked to his service mgr. and tech went thru problem and steps taken. They were at a loss. I am on my way out to my shop to run the wires down one more time. The guys at dealer ship seem to think that the motor is not grounding and it is searchiing for a ground thru the circuit board. I have one more control board left and i am going to try it now with motor grounded to battery. About the fuse I do not understand that at all it has not blown I even changed thinking something was wrong with it and it has a 25 amp fuse installed. Rear wipers work fine and has a 25 amp in it also.
#459 of 472 2000 Chevy Blazer Electric Locks by cararyarber Oct 28, 2009 (12:29 pm)
Last night my nephew left the back gate on my blazer open all night. It started fine, but when I got to work this morning I tried to lock the doors and nothing..... I checked all the doors and made sure that they were all shut including the gate. Still nothing. Since it was the gate left open I tried to lock all the doors thru that lock. Which worked. So I thought. When I went to my blazer at lunch, all the doors were unlocked again. I checked the back gate, it too was unlocked. I got in the blazer and started down the road and I heard a click. Then the "gate ajar" light came on. Once I got stopped, I tried again to lock all the doors with no luck and the gate ajar light keeps coming on. What do I do?????
#460 of 472 98 Jimmy Trip Odometer problem... by britmarie03 Oct 30, 2009 (4:35 pm)
I have a 98 Jimmy that Ive had for a year. 150k miles, runs like a champ...well since i fixed everything that was wrong. The last week or so, my trip odometer sporatically resets itself when I turn the car off, then restart it again. It always resets itself overnight (again this just started about a week ago), and sometimes resets throughout the day. I truly rely on my trip odometer for gas mileage as the gas guage is always jumping. I have very car knowledgeable friends and they have no clue. My best guess at this point is a short somewhere??? Any helpful tips, hints, or advice of where to start to try to get this fixed would be greatly appreciated!!!   Thanks!
#461 of 472 Underhood fuse box on 97 Jimmy by slarra Nov 15, 2009 (4:25 pm)
I must be an idiot because I cannot find the underhood fuse/relay box on my 1997 GMC Jimmy SLE. There are posts on this forum that refer to it for that model year, and my Chiltons has a picture showing a big, black plastic box sitting atop the driver's side fender. But I don't see that on my Jimmy! Where should I be looking? Replies to this message: cardoc50 (Nov 15, 2009 5:17 pm)
#462 of 472 Re: Underhood fuse box on 97 Jimmy [slarra] by cardoc50 Nov 15, 2009 (5:17 pm)
Replying to: slarra (Nov 15, 2009 4:25 pm) I also have a 1997 GMC Jimmy SLE. There is no fuse or relay box under the hood of mine either. There is a big black box under the hood on the right side.It is your PCM (powertrain control module) or computer is what some call it. On the firewall behind the engine there are three relays.All three of these are for the airconditioner unit.The box on top of the left (drivers side) fender is the anti lock braking system. There are three relays behind the glove box. One is the fuel pump relay, one is for the headlamps for high and low beam and daytime running lamps. The other I can't remember just now. When you open the drivers door, on the side of the dash is where the fuse box is located. There are two relays in there also.So, no you are not an idiot.
#463 of 472 strange electrical indications and problems 99 jimmy by cwangs1 Nov 16, 2009 (11:18 am)
I was driving down the road today at about 70 with the cruise control on and the battery light came on, a very sort while after, the airbag light came on. I looked down and the volt meter was droping. At about 9 to 10 volts the gauges died. (All except oil press and the transmission indicator as well as milage.) A mile or two down the road the truck was slowing (loss of power) so I pulled over to the side of the road to squeeze as many miles out of it as I could. I hit the edge of the road at about 50 mph and everything came back to life. Cut the hunting trip short turned around and on the way home it did the same thing another 9 times for the next 30 miles to the house. There may have been some viabration when I pulled over hitting the rumble strips but I would hope that we don't jump on it and assume a bad ground right off the bat. Checked the battery under load reading 12.4v stuck the meter on it after starting the engine and was reading 14.06v then it would jump around abit to 9.05v, 10.0v, 12.4v then back up to 14.06v and hold steady. The battery is old but the alternator is 8 weeks old. I have been reading the posts and found some similar but not the same. I also have been dealing with the inaccurate fuel gauge for about 3 years. I fill the truck up indicates full, never gets below half a tank until it jumps to E. Fluctuates when shifting from P to D or R. Love this truck but don't trust it to take trips with any more. I have had it since new in 99. By the way it is an SLE 4x4 4.3L v6. Appreciate any input anyone might have. Thanks. Replies to this message: cardoc50 (Nov 16, 2009 2:05 pm) cwangs1 (Nov 16, 2009 3:19 pm) jlflemmons (Nov 17, 2009 4:51 pm) cwangs1 (Nov 19, 2009 4:18 pm)
#464 of 472 Re: strange electrical indications and problems 99 jimmy [cwangs1] by cardoc50 Nov 16, 2009 (2:05 pm)
Replying to: cwangs1 (Nov 16, 2009 11:18 am) The first and formost thing I think of after reading your problem on the Jimmy is you may have put a rebuilt alternator on it. I have a 1997 Jimmy and had to take my wife to a specialized hospital about 200 miles away. A week before we left,I had a bad experiance very simular to yours. After checking and letting the parts store check it, it was bad. When it started going bad, it would lose power and I had to pull off at several rest areas because the lamps were getting dim and the doors locked by themselves and a couple other wierd things happend also.I would sit in the rain and finally get someone to jump me.When it started the guage would go up to normal as it rapidly charged the battery. It happened a couple more times that night. Altinator was the first thing I thought of.As I said it checked bad. I bought a reman altinator saving a great deal of money. It was good until the trip home from the hospital,same thing. I will also mention our 99 grandprix gt did the same thing only we could'nt get the windows to work at all.We were stuck inside and I had put a reman on it too.Put a new(not remanufactured) one on both vehicles and that's been a few years back.My sons 99 camaro he put four remans on it before he finnaly listened and went to new. I don't know if you went for reman or new but,new ones go bad sometimes too. It shorted out the battery in my Jimmy also.Had to get a new one. Check or have your altinater checked first Replies to this message: cwangs1 (Nov 16, 2009 3:19 pm)
#465 of 472 Re: strange electrical indications and problems 99 jimmy [cardoc50] by cwangs1 Nov 16, 2009 (3:19 pm)
Replying to: cardoc50 (Nov 16, 2009 2:05 pm) Thanks, thats what I initially thought too. I guess I will pull it and have it tested, it's not that hard to do. I have a couple minutes tonight and tomorrow night to do it.

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