ok i got it wrong.we dont have the grand marquis in england and since the
subject line said "merc" i htought this problem related to a mercedes, merc
in the uk being short for..mercedes..obviously.
Did the 1992 model still have the ole 5.0L or was it equipped with the 4.6L
First, pop the hood and check the wiring harness that connects to the
alternator. They tend to heat up and warp/melt and cause anywhere from a
bad connection to a melted mess. (This may not apply to the 4.6L or the
5.0L with the updated harness) While you'e looking at it, disconnect it and
make sure it's not filled with corrosion. It won't hurt to check.
Check the battery cables for corrosion, loose terminals/cables/crimps, etc.
Check the starter solenoid while in that area as well.
If the light is still flickering, it could be the diodes going heat
sensitive or just plain going flakey. You can rebuild the alternator
yourself if you'd like, or just replace it. Most places will test the
alternator for you, but being intermittent, it may test fine at the moment.
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
Check the Regulator, sounds like it could be going bad. Check the
electrolyte in the battery too, especially if you have one of the new
generation "Maintenance Free.." battery with a removable vent cap, that is
over 2 years old.
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