Fuel pump issues...

The relay can click and still not supply power. The typical problem is cracks in the solder connections on the circuit board inside. If you have good eyes and good light the cracks are visible as dark hairlines around the solder meniscus on the leads of components, especially the heavier ones.

I don't know what sort of fuses your '90 has, but if it has the round fuses you probably should take them out and buff up the contact surfaces on the fuses and holders with Scotchbrite or similar. Also check over the connections at the battery cable - in 700 series cars a few have had a wire corrode completely in two and cause the fuel pump not to get power (although the fuel pump relay doesn't cllick under those conditions). Still, worth a quick peek.

Mike

How do you know you are not getting voltage to the pumps, have you tested with a test light or VOM?

If so, and if it shows voltage from the positive wire, check and see if the black wire has a good ground; if it doesn't, check and correct the ground fault.

The relay is still in new condition. I checked for bad solder joints but everything looks fine. My next question is; what triggers the replay to send current to the pumps. I crossed 30 & 87/2 and the voltage showed up at the pump leads. When the relay is installed and the key is turned to the II position the left coil energizes but the right one (30 & 87/2) does not.

What energizes the other (right) coil?

I'm using a DVOM to test with. New copper fuses, cleaned ground connections. I'm a little confused as to what could be preventing the replay from energizing the side that feeds the pumps.

I think I may have discovered my problem.... stupidity :(

I was using the spare LH-Jet which was not mounted to the car. I plugged the original back in, which is still mounted, and both sides of the relay are energizing now.

Thanks for the replies and keep your fingures crossed for me.