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Old 11-07-2011, 02:41 PM   #1
Joe C
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Default ??? - 85 corvette - location of fuel pump relay

i don't have access to a FSM for an 85 corvette, so, can someone tell me where the fuel pump relay is located? trying to troubleshoot "zero" fuel pressure via long distance phone... TIA
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Old 11-07-2011, 04:22 PM   #2
cumbercr
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On the driver side firewall between the brake booster and the wiper motor. Can you hear the pump run when the key is first turned?
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Old 11-07-2011, 05:26 PM   #3
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Quote:
Originally Posted by cumbercr View Post
On the driver side firewall between the brake booster and the wiper motor. Can you hear the pump run when the key is first turned?
no, he can't hear the fuel pump. sounds like he's not getting power to the pump itself. haven't heard today if the fuse is OK... i figure he would check the fuse and relay before looking to replace the pump itself. my money is on the pump, but i figure its better to do some electrical checks first. BTW, thanks for the reply...

Last edited by Joe C; 11-07-2011 at 05:29 PM.
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Old 11-07-2011, 07:54 PM   #4
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If the car happens to have the 4+3 manual tranny, the OD relay is next to the fuel pump relay. Both relays are the same. I don't think the relay is very expensive; maybe $12-$15??

Also, check the wire harness at the fuel pump for voltage. The heavy black rubber boot around the filler neck has to be removed. Should be a tan/white wire.
Disconnect the wire and check for voltage but note that the pump will only run for a couple seconds once the ignition is turned to the ON position if the engine is not started with the key.

This tan wire comes from the fuse block. The FP fuse is a 10A and should be at the lower right corner of the block.

Power for this circuit comes from the fusible link H behind the battery.
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Old 11-07-2011, 07:54 PM
 
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1984, 43, 85, c4, corvette, fuel, harness, jumping, location, pump, realay, relay, replacement, sale, test


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