Electrical problem 90 suburban - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hgerrick · 03-02-2007, 10:09 PM

I seem to have a dead circuit on my 90 Suburban. The brake light on the dash is on, the power windows don't work and the speedometer does not work. The fuse is dead on both sides for the power windows, if I add power at this fuse the windows work and the light goes out. I'm guessing the speedometer might work too. Anyone have any ideas.

thanks, HG

screwballl · 03-04-2007, 01:09 PM

typically there is a ground causing a problem... not sure what else it could be but I am sure someone will come along and find something

hgerrick · 03-04-2007, 04:58 PM

The problem started after I removed a porly installed electric brake controller. I would doubt it's a ground problem because when I power the circuit the windows work. I don't have a wiring diagram that shows where the "hot in run" power comes from......... Thanks for the reply.

HG

smashingchuck · 03-21-2007, 08:12 PM

I had the exact same symptoms on my suburban, except my sub doesn't have the power windows. Turned out to be a loose connection where the steering column plugs in to the wiring harness. It's a really long flat plug under the dash right on the column.

03-02-2007, 10:09 PM	#1
hgerrick Registered User Join Date: Mar 2007 Location: Hanover PA Posts: 2	Electrical problem 90 suburban I seem to have a dead circuit on my 90 Suburban. The brake light on the dash is on, the power windows don't work and the speedometer does not work. The fuse is dead on both sides for the power windows, if I add power at this fuse the windows work and the light goes out. I'm guessing the speedometer might work too. Anyone have any ideas. thanks, HG

03-04-2007, 01:09 PM	#2
screwballl Tonawanda 454 Join Date: Mar 2004 Location: Liquid Sunshine State Posts: 2,754	Re: Electrical problem 90 suburban typically there is a ground causing a problem... not sure what else it could be but I am sure someone will come along and find something __________________ 91 Chevy Suburban Tonawanda 454 R2500 - SOLD!!! 04 Dodge Durango 5.7L Hemi 2WD, 24K miles (as of July 2011) In the past 30 years about 90% of Fords are still on the road, the other 10% made it home. -------------------

03-04-2007, 04:58 PM	#3
hgerrick Registered User Join Date: Mar 2007 Location: Hanover PA Posts: 2	Re: Electrical problem 90 suburban The problem started after I removed a porly installed electric brake controller. I would doubt it's a ground problem because when I power the circuit the windows work. I don't have a wiring diagram that shows where the "hot in run" power comes from......... Thanks for the reply. HG

03-21-2007, 08:12 PM	#4
smashingchuck It'd be alot cooler if you did Join Date: May 2003 Location: Three Rivers, MI Posts: 2,345	Re: Electrical problem 90 suburban I had the exact same symptoms on my suburban, except my sub doesn't have the power windows. Turned out to be a loose connection where the steering column plugs in to the wiring harness. It's a really long flat plug under the dash right on the column. __________________ 78 Build Thread 4Runner Build

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