Fuse Box Voltage Drops To Zero Volts While Cranking

seandmueller

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Hey Everyone,

Another fellow newcomer here and hopefully y'all can help me with a current situation.

I need a 12-volt source with the key on as well as cranking for my Sniper EFI I'm setting up.

I discovered I don't have a good 12-volt source while cranking on my fuse box.

I've found several locations that read 12-13 with the key on, but when I crank they drop out to 0 volts.

The only source I've found that works are my 12-volt constant power from the top of the fuse box.

It drops to around 11-12 volts while cranking.

Obviously I'm not going to wire to the constant because of the battery drain.

Had my Battery tested and checks good as well.

Everything on my EFI worked out well when it was on the constant 12-volt source.

Not sure if anyone has experienced this with their Trans Am.

Thanks,

Sean
 

Pontiac Trans Am

Smokey
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Dec 13, 2018
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www.pontiactransam.com
Hey Everyone,

Another fellow newcomer here and hopefully y'all can help me with a current situation.

I need a 12-volt source with the key on as well as cranking for my Sniper EFI I'm setting up.

I discovered I don't have a good 12-volt source while cranking on my fuse box.

I've found several locations that read 12-13 with the key on, but when I crank they drop out to 0 volts.

The only source I've found that works are my 12-volt constant power from the top of the fuse box.

It drops to around 11-12 volts while cranking.

Obviously I'm not going to wire to the constant because of the battery drain.

Had my Battery tested and checks good as well.

Everything on my EFI worked out well when it was on the constant 12-volt source.

Not sure if anyone has experienced this with their Trans Am.

Thanks,

Sean
Something doesn't sound correct friend.

Strange!

Thank you,
PTA Staff