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Old 05-11-2008, 04:26 AM
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causes for high volt meter reading +16 !

Installed a 1994 Z/28 LT-1 engine in my coupe and the in dash volt meter is pegged at 16 + volts ! What are the possible causes for this ?
The car has a new Optima battery.
The starter and Alt. were checked out at Advanced auto and are O.K
The volt meter gauge is new ( Shark, made by Dolphin )
The wiring is a new Ron Francis setup for a LT-1
The only other electrical problem I have that may or may not, be connected to this are the dual electrical fans work intermittently. ( stock 1994 Camaro Z/28 fans )
Any and all help would greatly be appreciated.

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Old 05-11-2008, 05:42 AM
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car off, use a dvm and measure the volts on 20VDC scale across the batt lugs (not cables)...batt should read 12.4V approx if ok

car running at 1500+rpms, measure the alt output VDC at the heavy wire output lug on the rear while holding the ground lead agianst the alt body....should read max 14.4V to prevent the battary overcharging and exploding!!!!

if the batt and alt check out ok, it's a bad guage....

measure across the guage terminals with the DVM to confirm (DVM reads 14.XV and guage reads 16V pegged=bad guage)
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