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4 Wheel Drive/SUVs/1991 GMC TURN SIGNAL COMBO SWITCH

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Expert: - 8/16/2004


Question
I have a 1991 GMC F/S PU, my right blinker will not blinkin the back, but it will in the front. I was wondering what a Turn signal combo switch does? I have replaced the bulbs, checked the fuses, I even intalled a new brake switch previously my brake lights went out. I had to rewire my trailer light because it was rigged. I connected my tailer all was workimg. But I now my right turn signal doesnt work please help. I have been using my Chilton, But it does not show me a picture or tell even what this switch does.
         Thank you,
           Adriane  

Answer
Adriane,

It sounds like a broken wire, or bad contact.  Check and see if the right brake light works on the truck, or on the trailer.  When you wired the truck for the trailer, you may have pulled loose, or broken the wire to the tail light.  As far as the "Turn signal  combo switch" goes, I am not familiar with that term.  Another possibility, is the turn signal "flasher".  This is a unit that causes the light to flash when the turn signal is on.  It is usually located under the dash on the driver's side, and is a plug in unit.  On some vehicles, it is located on the fuse block.  It is an inexpensive item, and easily replaced.

Carl

4 Wheel Drive/SUVs

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Carl Brandt

Expertise

Will discuss suspensions, lifts, lockers along with tire suggestions. Trail ratings and possible requirements needed for specific type of trails. Safety equipment and what you should carry with you. Certified off-road instructor. I am not a mechanic, and 4-Wheeling is a hobby, so if I can't answer a technical question it is due to my mechanical knowledge being related to vehicles that I have owned, or have worked on. I do not have manuals on all vehicles.

Experience

40 plus years of 4 wheeling in a variety of vehicles. At the present time, my major off-road rig is a 94 Jeep Wrangler with a spring over and a 1 1/2" suspension lift. This gives me a total lift of 7" or so. I have lockers front and rear. I have removed the track bars, and sway bar for maximum articulation. I am running a stock 2.5 ltr 4 cylinder with a Jacobs ignition along with a cold air high flow filter. It has 4.56:1 gears with a Dodge NV4500 transmission along with a 3.8:1 Atlas II transfer case. This gives me a final ratio of 105:1 in low gear/low range. Other vehicles I own, are a 96 Ford F-250 with a 6" lift, posi rear end, 36" Hummer tires, 5 speed with a fuel injected 460 ci engine, an 87 Samurai with an 8" lift, Ford 9" rear end with a spool, Chevy Dana 44 front end with an electric locker, 5.88 gears, 16% reduction in high range and a 6.5:1 low range with 35" Baja Claws, and a stock 2003 Grand Cherokee Overland. Trails I have run are the Rubicon (10 times), Dusey Ershim, Fordyce Creek trail, McGrew trail, several trails in Moab, Utah along with local monthly runs.

Organizations
Lost Coast 4x4's Cal 4-Wheel Corva UFWDA Blue Ribbon Coalition

Education/Credentials
Certified off-road instructor - Certificates in engineering/electronics

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