Thread: Agh! ABS, BAS and ESP Light On and Spoiler Won't Go Down!
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Old 12-31-2017, 05:49 PM
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tighed1
tighed1 is offline
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Join Date: Aug 2008
Location: Sierra Vista, Arizona
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Default Re: Agh! ABS, BAS and ESP Light On and Spoiler Won't Go Down!
I've repaired a few RCMs with those exact symptoms. Turns out it was a bad traction control relay. Still haven't looked to see how it possibly affects the speedo.
Weird.

  • Car will start and run with bad traction control relay. Wing will be up and ABS/ESP lights will be on, possible no speedo operation.
  • Car will crank but not start with bad fuel relay (really!).
  • Car will not crank or start with bad engine control relay. With key in the ON position, wait, the radiator fan will spin VERY fast.
  • Car will start and run with bad air pump relay but will throw a CEL and PO410 code.
  • Car will start and run with a bad horn relay. Horn will not work!
 
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