4 Wheel Drive/SUVs/1994chevy 4wd

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Question
Four wheel drive was working fine locked it in one morning light came on put it in gear started to back up light went out front hubs do not lock in shift into four low and fuse is good

Answer
Denise,

1. Locate the transfer case switch on the top of the transfer case, this switch will have two wires going to it. One wire will be Brown, this is Battery Voltage coming from the fuse block, the other wire is Blue and goes to the front actuator.

2. If there is voltage on the Brown wire, but no voltage on the Blue with the transfer case in 4x4, the switch will need to be replaced.

3. If there is voltage on both Brown and Blue, but no voltage on the Blue wire at the front actuator, check the wire between the transfer case switch and the front actuator.  You can do this by checking voltage at the front actuator.  If there is voltage there, then the front actuator would be the suspected faulty part.

It would be a good idea to purchase a repair manual for the Chevy, as they have step by step instructions on trouble shooting issues like this.

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, 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.

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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