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look in the engine compartment, behind the firewall there are a series of relays next to the windshield wipers, looking at a left hand drive car about a third of the way along on the left you will see a push buton, now go to the middle, you will see a long unit, about 5 inches, it has a harness attached to its right and is the longest relay there. That is the fueld pump relay, a favorite is dry joints in it whcih can be soldered, the symptoms are fuel pumps not activating or irregular running.

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Q: Where is the fuel pump relay located on an 89 420 sel?
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