LT1-LT4 Modifications 1993-97 Gen II Small Block V8

95z keeps blowing coolant fan fuse.

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Old 10-02-2010, 12:44 PM
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Question 95z keeps blowing coolant fan fuse.

Car has been doing this for a while now. I wasn't sure what was going on cause it was getting hot when sitting and throwing an engine light. I checked coolant and its fine so I checked the fuses and the 10amp fuse for the coolant fan is blown, so I put another one in and within two days it blows again and sets the check engine light. Any ideas why this keeps blowing the fuse?
Old 10-05-2010, 09:03 AM
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Any ideas. I've been driving it and luckily its been cold out so the car has been staying cool enough but I need this fixed.
Old 10-05-2010, 09:52 AM
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ok try this........unplug both the fans put a new fuse in and see if it blows.......if it blows then the fans arent shorted......if it doesn't blow one of you fans is shorted......
now if it does blow im willing to bet the relay shorted out on you....pull out the relay and put a multi meter from where terminal 30 on the relay plugs into the fuse box and measure resistance to ground.....if you have 0 ohms there is a short also you should have 12 volts here with the key on........im willing to bet its the relay thats bad though i seen that before
Old 10-05-2010, 12:32 PM
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A shorted fan would blow a fusible link, not a fuse. The fuse is for the relay power-not the fan power.

I'll bet it's not even the fans. The fan fuse powers lots of things, including:
O2s
EGR and EVAP solenoids
reverse lockout and skip shift solenoids

If you have headers, I would bet on a burned and shorted O2 wire.
Old 10-05-2010, 12:40 PM
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Originally Posted by shbox
A shorted fan would blow a fusible link, not a fuse. The fuse is for the relay power-not the fan power.

I'll bet it's not even the fans. The fan fuse powers lots of things, including:
O2s
EGR and EVAP solenoids
reverse lockout and skip shift solenoids

If you have headers, I would bet on a burned and shorted O2 wire.
so the fuse is on the coil side of the relay and the fusible link powers the dry contact side of the relay??? hmm didn't know that.....cool!!
Old 10-05-2010, 02:04 PM
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Originally Posted by quik95lt1
so the fuse is on the coil side of the relay and the fusible link powers the dry contact side of the relay??? hmm didn't know that.....cool!!
Right. That little ol' 10 amp fuse could not handle the fans.
Old 10-05-2010, 02:07 PM
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mine did the same thing, it ended up being a shorted/seized air pump that was blowing the fuse. unplug the pump and see if it stops
Old 10-05-2010, 06:31 PM
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Originally Posted by 97 Trans Am ws6
mine did the same thing, it ended up being a shorted/seized air pump that was blowing the fuse. unplug the pump and see if it stops
Fans and AIR pump are not on the same fuse for a 95.
Old 10-05-2010, 08:27 PM
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Alright thanks for all the suggestions. I'll give them a shot and see what the outcome is.



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