C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Where are the alt fuses for my 1990 vette

Old 01-08-2018, 04:39 AM
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lewhitmo
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Default Where are the alt fuses for my 1990 vette

I am not getting any excitation voltage to turn on the alt, where should I look?
It should be ign voltage from the fuse panel but no fuse for alt
Thx
Whit
Old 01-08-2018, 07:37 AM
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cdm747
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Originally Posted by lewhitmo
I am not getting any excitation voltage to turn on the alt, where should I look?
It should be ign voltage from the fuse panel but no fuse for alt
Thx
Whit
There is no fuse for the alternator. There is a fusible link on the junction block behind the battery. Either the link is melted or the connection at the block is bad.
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Old 01-08-2018, 07:49 AM
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WVZR-1
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CHARGE INDICATOR is in a circuit with 'CLSTER' fuse in fuse box. Charging system has 2 Fusible Links from the 'jump block'.

Using your choice of diagnostics for a typical CS130 with P-F-L-S (P - NOT USED) should work for you.
Old 01-14-2018, 11:13 AM
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lewhitmo
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Originally Posted by WVZR-1
CHARGE INDICATOR is in a circuit with 'CLSTER' fuse in fuse box. Charging system has 2 Fusible Links from the 'jump block'.

Using your choice of diagnostics for a typical CS130 with P-F-L-S (P - NOT USED) should work for you.
Thx I have no sense voltage when I turn on the key
is this an ign voltage or does it also come from the hot post in back of the batt
Im thinking that the alt must be off when the key is off
Thx again

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