all my lights on my 2000 mercury cougar are surging,i have unhooked the positive terminal on the battery to test the altenator,what could it be
Feb 9, 2011 at 11:56 PM
surging lights
JOE0621
- MEMBER
- 1 POST
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Firstly you should never undo the battery terminal with the engine running, the voltage spike created when touching it back on can do serious damage to the ECU, now, i would be getting the alternator checked as this may be a faulty voltage regulator, the surge in the lights may well be the voltage increasing and decreasing due to a faulty reg, start here.
mark (mhpautos)
mark (mhpautos)
Feb 10, 2011 at 2:22 AM
Also a dimmer and headlight switch -as advised with the voltage regulator can be integral with the alternator or the alternator's field generation of the alternator is being controlled by the computer
Feb 10, 2011 at 2:57 AM
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