ABS Light Comes on and Heat Blower Quits

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matad311

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Ok need some help! When the ABS light turns on (ABS stoops working) I lose my heater control switches and the blower turns off but when the ABS light turns off (ABS starts working) it all starts working again. Anyone know how these 2 systems are tied together? Need some help because I can't drive into work now and need defrosters to work since its 10deg outside!

Here is a youtube video Link showing the issue happening....
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Urambo Tauro

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I had a flickering dash light/ intermittent HVAC issue that I solved by tightening a loose ground point at the transmission dipstick tube bracket, (bolt @ RH top of bellhousing). I'm not sure if that's the stock location, or if it was moved by a previous owner when they put the engine and transmission back in.
 

Eveready

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It definitely sounds like a flaky ground. If you can find someone with a shop manual for that model it would be a good idea to check the schematic and see where those two are grounded. A bad ground can impersonate a whole lot of different other things. Please report back to the thread when you chase it down in order to add to the body of knowledge.
 

matad311

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Ok so just to update this post! I have figured the issue out and it was a bad Ignition harness going from the key tumbler down to the plug under the dash. When you would tilt the steering column up and down the blower motor and ABS light would flash on and off from working and not working. So sign of a common Chevy truck issue with that going bad but normally the truck has starting issues, not this. See my updated YouTube video showing the problem!

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