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Re: 1997 Mazda B4000 ABS and 4WD warning lights problem
Joe S. wrote:
> Bought a used 1997 Mazda B4000 last week; been driving it for 10 days
> without a problem. Today, when I started it, I got two warning light
> indications:
>
> 1. ABS light comes on and stays on.
> 2. 4WD HIGH and 4WD LOW lights flash 2-3 times then go off. After a few
> minutes, they flash again, then go off. 4WD does NOT engage -- I flipped
> the dash switch into 4WD H and 4WD L, nothing happened, truck remained in
> 2WD.
>
> All fuses look good -- I pulled the fuses, looked at them, then put them
> back, did not replace any fuses.
>
> I installed my amateur radio transceiver in the car today and these warning
> lights started after I completed the installation. During the installation
> I did not touch anything else on the truck -- was very careful to avoid all
> internal wiring, etc. I did connect my amateur radio directly to the
> battery -- a pair of #10 wires, fused, connect to the battery -- one to the
> pos terminal, one to the neg terminal. I loosened the battery cable clamps,
> one at a time, and inserted the connector on the end of the pos and neg
> power leads for the raido under the head of the hex bolt that tightens the
> cable clamps onto the battery terminals. I do not have my antennas
> installed, so, I have not transmitted with the radio -- I know some vehicles
> have problems with RF energy from transmitters getting into the computer but
> that could not be the case here.
>
> I turned the ignition switch on and off several times, no change. Drove the
> truck a couple of miles, shut down, started, drove back. No change in the
> warning lights, they still come on. Everything else works fine.
>
> I have noticed, every day, a small wet spot on the ground under the truck --
> it's brake fluid -- I stuck my finger in the spot and smelled the stuff.
> The spot is located under the center of the engine compartment (centered
> from side to side), just behind the front axle. I have not been able to
> find the source of this spot. Brake fluid level has not changed in the 10
> days I have had the truck.
>
> Usually, when I start the truck, I hear a muffled "clunk" from underneath
> which I have assumed to be a solenoid in the 4WD system activating. Now I
> don't hear that sound.
>
> Is it possible that, in loosening the cable clamps on the battery cable, I
> interrupted the power supply from the battery to the truck's computer or
> something that would have caused these warning lights to go on?
A defective shift motor can cause this and it's a very common problem.
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