91 Grand Am Blowing Fuses

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  #1  
Old 03-20-07, 07:48 PM
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91 Grand Am Blowing Fuses

ok i have a 91 grand am witrh the 2.5 and everytime i go to crank the engine it blows the fuel pu\ign fuse. any ideas were to look.
 
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Old 03-20-07, 08:58 PM
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Originally Posted by chevyastro4x4 View Post
ok i have a 91 grand am witrh the 2.5 and everytime i go to crank the engine it blows the fuel pu\ign fuse. any ideas were to look.
It is likly the pump is frozen and every time you crank it turns on the pump and the pump trys to run. But it is frozen and thus blows the fuese.

Try this. Go to the pump connection and run a wire from the pump to the battery. When you connect it to the battery see if it sparks is the the pump running or is it tryes to melt the wire.
If so the pump is frozen and grounded in the gas tank. It will blow the fuse and melt the wire.'
 
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Old 03-21-07, 04:34 AM
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Not to be argumentive with Goldwing, but I think I would take an opposite approach and DISCONNECT the fuel pump connector, then turn key on. See if the fuse remains intact.
 
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Old 03-21-07, 05:54 AM
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Originally Posted by Goldwing View Post
It is likly the pump is frozen and every time you crank it turns on the pump and the pump trys to run. But it is frozen and thus blows the fuese.

Try this. Go to the pump connection and run a wire from the pump to the battery. When you connect it to the battery see if it sparks is the the pump running or is it tryes to melt the wire.
If so the pump is frozen and grounded in the gas tank. It will blow the fuse and melt the wire.'
sorry forgot to metion i've replaced the pump twice still the same, but i'll try disconnecting the harness
 
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Old 03-21-07, 05:57 AM
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Sounds like you've got a short somewhere in that part of the harness, Astro.
 
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Old 03-21-07, 06:35 PM
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unpluged the harness and still does it
 
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Old 03-21-07, 06:47 PM
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Time to start backtracking wires; will probably not be a lot of fun.

Might yanking the pump relay to see if there's any change.
 
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Old 03-21-07, 06:54 PM
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Originally Posted by the_tow_guy View Post
Time to start backtracking wires; will probably not be a lot of fun.

Might yanking the pump relay to see if there's any change.
i try pulling relay and still does it
 
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Old 03-21-07, 07:11 PM
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How are your wire-chasing skills? Think you'll be getting a fair amount of practice.
 
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Old 03-21-07, 09:23 PM
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ok i dropped the tank again, and switched pump and sender and still does it, but if i unplug it, it doesnt blow it
 
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Old 03-22-07, 04:47 AM
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That would tend to point to the pump, but before disconnecting it didn't help. I'm thinking maybe it's going to be in the wiring near where you were working and moving it around while working on the pump is making it intermittent.
 
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