My 91 Honda Accord ex's speedometer stops working if, I turn on my radio, or roll down the window. The Service light comes on and sometimes the check engine light as well. The car sounds and runs fine. Is this an electrical problem? And how hard is this to fix?
Sounds like a possible bad ground wire, you will need to find out where these 3 items ground and see if they have a ground point in common.
Have the alternator checked for the out put volts.The battery cable ends,and the battery post,need to be removed,and cleaned,cleaned,real shiny,no gray or black on them.The alternator needs to be charging 13.65,to 14.25.If it is not in this range,replace the alternator.This is most likely the problem.If this was helpful,please let us know,thank you.
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