XJ6 & XJ12 Series I, II & III 1968-1992

Alternator Startup Delay

 
  #3  
Old 11-24-2008, 03:26 PM
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Default RE: Alternator Startup Delay

There is a single terminal lead (18 gauge, it's a small wire)that plugs into the back of your alternator...it's an "exciter" wire, and if that lead is open circuit the alternator won't start charging until engine RPM's are at least 2000. Check connection at alternator.
 
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Old 11-24-2008, 05:57 PM
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Default RE: Alternator Startup Delay

The capacitor is for radio supression, and has nothing to do with nothing. There is a brown/ black color coded wire with a single Lucar female spade connector: that plugs onto a male spade terminal for the alternator field winding, on the back of the alternator. If you follow it back to source, it is routed behind the A/C compressor, tywrapped to the fuel return pipe at the front of the cylinder head (along with the A/C compressor clutch feed wire and the leads to the air pump diverter valve), through the engine wiring harness to CF3 (right bulkhead multiplug), to the battery warning light on the dash.
 
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Old 12-06-2008, 04:24 PM
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Default RE: Alternator Startup Delay

After you've checked the exciter wire etc to make sure the charging circuit operates don't be too surprised if your voltmeter is still slow to react. Every Ser III I've driven has a lazy voltmeter. Sorta like a morning sickness type of thing
 
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Old 12-06-2008, 06:06 PM
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Default RE: Alternator Startup Delay

The"headlights brighten" comment in the original post precludes a voltmeter inaccuracy.
 
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Old 12-06-2008, 07:48 PM
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Default RE: Alternator Startup Delay

ORIGINAL: JagtechOhio

The"headlights brighten" comment in the original post precludes a voltmeter inaccuracy.

Good point....I missed that !

Cheers
DD
 
 
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