[200q20v] voltage fluctuations

C1J1Miller at aol.com C1J1Miller at aol.com
Wed Oct 11 16:38:20 EDT 2000

In a message dated Wed, 11 Oct 2000  3:34:18 PM Eastern Daylight Time, Gregg Edwards <GEdwards at idts.com> writes:

<<  Measured alternator output ~13.7V,  gauge reads correctly when cold (40
degrees F), when warm it drifts down toward 12V mark while alternator output
remains at 13.7V.  Replace gauge?  or more serious problem?   Thanks Gregg

First step is to measure voltage at the battery under the rear seat, before starting car, then while idling.  Also measure available voltage at the alternator or jump start post.  If you see a difference of more than about 0.1 volt, you may be developing a high resistance connection at the "welded" splice in the cable from the alternator/starter to the battery.  The splice may be heating up and increasing the resistance???
Details on my page re: repair.

More information about the 200q20v mailing list