Volt gauge strange behaviour

[BjornV]

Hi there.
I want to know what you think about the following.
Car in question is a 1994 6.0L V12.
When I start the car, the volt gauge sits absolutely still. No movement at all.
After approx. 5 minutes it suddely wakes up and shows what it normally does.
I do wonder what causes this?

Facts:
-Battery warning light turns off directly after engine start.
-ca 2 min after engine start I have about 14,5V at the battery (engine idling).
-Afer a few miles of driving, I have 13,8 V at the battery (engine idling).

So I seems like the altenator is OK and charging.
But something is strange with the gauge.

[ng4xjs]

Hi Bjorn
My car is the 4.0L version and I had something very similar. I tracked my problem down to the positive and insulated terminal that passes through the bulkhead on the left side (RHD) car. If your car is LHD then behind the fuse box there is a power insulated terminal that passes through the bulkhead (firewall) which can become corroded. It needs to be cleaned or replaced.

Hope this helps

Nick

[BjornV]

Interesting. Thanks for the tip, Nick.

My car is also RHD, actually. It was impoted to Sweden from the UK a bit over 10 years ago.
I will try to find that terminal.

Anywone thas has a picture of it?

Best regards

[BjornV]

Strange things, these cars.
After consistently showing this problem for almost a year, it has now disappeared.