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4 Wheel Drive/SUVs/1998 Bravada Service All wheel drive lite


Bravada has 163000 on it.All wheel drive not working but no light on dash,til we replaced the atc (active trnsfer case) fuse.Reset with computer after taking out box on passenger side kick plate.Got another box from junk yard,put it in and service all wheel drive light came back on,and still of course just rear wheels spin,no all wheel drive.Was told possibly a corroded wire or switch.All wheel drive went in and out last winter occasionally.I understand you are not an expert,just looking for another opinion.Thank you kindly in advance!!


I would get a repair manual, and a multimeter, for the Bravada, and check out the wiring diagrams.  With these two items, you will be able to trace out the wiring, and test for faulty grounds.  Bad grounds to the transfer case, and corroded or broken wires, not uncommon problems.  Many of the 4x4s in this year range, use a disconnect on the front differential, which may be electric, or vacuum.  If it has this, and it is faulty, you will not be able to engage the front end.  You can find this out in the manual also.


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Carl Brandt


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, and I suggest that you obtain a repair manual for mechanical problems and do some research before asking your question. Most mechanical questions can't be answered completely without looking at, or listening to the vehicle in person.


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.

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

Certified off-road instructor - Certificates in engineering/electronics

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