Alternator 88 XJ-S

["Himes,John W." <jwh@mime.dw.lucent.com>]

Well, I did get the tests done, my battery is fine, & the problem looks like 
the voltage regulator is going out, & the alternator may not be pumping out 
what it should ( 44 amps, but then again it depends on what the car & 
testing equipment was demanding at that moment ).  Called my local Jaguar 
dealer & they do not sell the voltage regulator separate.  I do have a few 
good recommendations on where to have it re-built & was given a caution 
about the "chain" stores rebuilding.  I was informed that some places that 
do the re-building for the chain stores, may do a quick diagnose, correct 
the problem, clean up the unit & give you a lifetime warranty that you WILL 
be using after something else fails that was never replaced, in other words, 
not a complete rebuild. ( food for thought )
If I do decide to go with a "new" unit, I will go with the Bosch 115 Amp.
Here are the low prices I was quoted ( all US Dollars )
Dealer - $258.75
Checker Auto Parts - $133.50 Bosch 115 AMP or $91.00 for a Lucas 75 AMP
Lakewood Auto Electric - $300 for a complete rebuild & system check out ( 
the place I was referred to )

I also checked on the Alternator Dump Module listed in Kirby's book (P.113) 
as a fix for the 115 AMP alternator to function properly at idle ( described 
in his book ).  My local dealer wants $161.75.  Just an FYI.

At least it has not failed yet, just not quite keeping up with the demand. 
 Glad I have a good battery & a charger at home ;-)

John Himes
88 XJ-S 100K Miles :-)

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