C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

No ABS light but wheels do lock!

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Old Oct 17, 2024 | 01:10 PM
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Default No ABS light but wheels do lock!

Hello, I have a 1990 model with the 6-speed. I bought it from someone who had bypassed the abs system apparently due to a faulty Bosch pump. Obviously I had the ABS system light on the dash.

I bought and reinstalled a remanufactured ABS pump with it's controle module, from a 89 model. I replaced the pump with the new one but if I remember correctly I had to keep the original module from my 90.

Since then, I have no more ABS light on the dash, BUT wheels do lock if I brake very hard, meaning the ABS probably doesn't do its job...

​​​​​​Any idea?
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Old Oct 17, 2024 | 03:41 PM
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Does the ABS active and ABS light come on at "Key On" for bulb check?
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Old Oct 17, 2024 | 05:11 PM
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Originally Posted by ChumpVette
Does the ABS active and ABS light come on at "Key On" for bulb check?
I will need to double check tomorrow but I'm quite sure yes. What can be the different causes depending if it's the case or not?
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Old Oct 18, 2024 | 04:01 AM
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Originally Posted by ChumpVette
Does the ABS active and ABS light come on at "Key On" for bulb check?
Okay I've verified, the ABS service light lights on when the ignition is on, then it turns off and stays off.
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