Working through the V12 cooling system, belts

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#21

01-30-2021 | 03:11 AM

Grant Francis

Joined: Feb 2010

Posts: 27,809

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From: Adelaide Stralia

WELL DONE>

Simple cars these Jags, ONCE all you have done is done, and keeping them that way is now a breeze.

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Noah (02-03-2021)

#22

01-30-2021 | 09:16 AM

Doug

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Joined: Mar 2008

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From: Pacific Northwest USA

Quote:

Originally Posted by Noah

Issues/Questions:
-the voltage gauge in the car is very slow to come up and once it does it sits around 11 or 12 volts. Could it just be a bad gauge? I cleaned all the connections at the firewall post. I guess I could remove the gauge and clean the contacts. Since the gauge is registering somewhat and the battery is charging does that mean the exciter wire is working as intended? I have a cheap voltmeter that plugs in to the cigar lighter in the cabin and it shows 14+ volts there also.

Every Series III I've owned or driven has a slow moving volt meter. Not sure if it is inherent to the design or an actual fault. If the latter, well, every Series III seems to be afflicted.

As for the low reading, there should a small screw on the back of the gauge itself to adjust the reading

If the system is charging, and the warning light extinguishes (which you didn't mention but I am assuming), the exciter circuit and wire is OK

Cheers
DD

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Noah (02-03-2021)

#23

02-03-2021 | 05:06 PM

Noah

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Joined: May 2012

Posts: 324

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From: Roswell, GA

Thanks gents.

Doug, the battery/warning light does extinguish so that is good. I'll keep an eye on the actual voltage showing up at the battery and on the cigar lighter plug and may eventually look at adjusting the gauge if it doesn't wake up more.

Greg, thanks, it has been pretty cold here lately so it makes sense the fan may not kick on if the compressor isn't kicking on. This car has the Delanaire III unit and the fan doesn't come on with it set to defrost or any other setting. The heat and a/c work, but the system needs a little work. The right hand blower is not working and the fan speed is the same no matter the setting. Removing that blower is on my long to do list.

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