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Why wont 94 4runner fuel pump work I bypass the relay and the pump works?
Wiki User
∙ 6y ago
Assuming you have checked fuses and swapped the relay with another known good one, knowing that the secondary fuel pump circuit works inspect the primary circuit for problems like damaged or disconnected wiring, ignition switch, fuel pump cut-off switch, etc.
Wiki User
∙ 6y ago
Wiki User
∙ 6y agoTake a test light to your relay. When you say bypass, I'm assuming you're talking about jumping power from the 30 post to the 87 post. Take a test light, get a paper clip, back probe, whatever, stick it into the 85 slot. Connect the test light ground to it. With the key on, check the 30 post for power. If it lights up, you know you've got both power at the 30 and ground at the 85. If not, clamp your test light to the negative side of the battery and repeat. If you get light at this point, you know the ground for the relay is faulty. Repeat with the 86 slot.
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