Question about 1987 Porsche 924

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No power to fuel pump, no power to fuse, relay closes and the other part of the relay dosen't any ideas, i think it is something simple

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There should be some over-sized fuses in a fuse block under the hood. Often they are on the firewall, behind a cover or near the battery in a fuse box. It's all just a guess since there isn't enough information to figure out what's really going on. There is a "lock out" in the control module. Disconnect the battery. disconnect the control module. Wait. reconnect the control module. reconnect the battery. Voltages should be correct. If that does not help below is a link for fuses:

this link fuses:

may be the crank senor also as if it doesn't sense spark it will not engage relays. Hope this helped Tim

Posted on Oct 16, 2010


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First, check with the key on to see if you have power to the pump, if no power then we'll look elsewhere, Some solutions could be a faulty pump Or Inertia switch, but that does not match with having to tap the fuse box to start it, Also, remove the fuel pump relay and with the key on test for power to the relay, this can be done with a simple test light.

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