D1 Alternator Issue?

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GroupW

Well-known member
Apr 20, 2004
74
0
Colorado
Had a recent episode with my D1. I currently run 2 optima batteries with a Hellroaring isolator/combiner. On 2 occasions, I started the truck - tach and spedo dead. The first time it was a cool (<50 degree) morning, the second time it was warm. I thought my alternator was dead, but I had to drive the truck a short distance anyway. As soon as the truck warmed up a bit, everything came back to life...both times. Since then, the truck has not had a repeat of the same issue.
Sound familiar to anyone? Ideas?
 
Levi

Levi

Well-known member
Jul 27, 2004
561
28
Cheyenne, WY
I had that happen to me once after leaving my truck at the airport for a week when it was -20 the entire week.

Someone will correct me if I am wrong but I think I remember reading here that water contamination in the VSS will do that.
 
G

GroupW

Well-known member
Apr 20, 2004
74
0
Colorado
New belt...maybe so. I actually have one waiting for install. Don't see the VSS connection though. How would the VSS cause a momentarily dead tach/spedo. Didn't have any of the usual bad VSS symptoms.
 
E

enjoi1968

Well-known member
Aug 27, 2008
625
5
MD
I had a lot of weird things happen, tach would die at start or during driving, speedo die or bounce.

I'd replace the belt, and go with it. If it happens again get a VSS. Mine acted up for about a year before it finally went
 
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