Fuel relay/pump

[Scootsk]

So the other day I went to the German Butcher shop in my fine German motor car, 1990 Cabriolet. When I came out the car would crank and wouldn’t start. First reaction, change the fuel pump relay. Had an old spare in the glove box, no good. Then I switched it with its neighbor, still no good. This is when the heavens opened and started pouring. Ugh. Called for a tow and had the car towed back home. Well today I had a chance to look at it. Tried to start it, same issue, crank no start. So I start checking voltages at the relay pins, 12.5 volts. I stick the relay back in after wiping the pins off. Nothing. Then I decide to try to jump pins 30 and 87, car starts right up. I scratch my head because I tried three different relays there and nothing. Out of curiosity, I put the original relay that I had just removed, Car started right up. Did three or four more starts, no issues. WTF? Can someone tell me what May have caused this?

[byterrr]

Had a similar issue recently which had me confused for a while.

It ended up being the new Chinese fuses I put in the under bonnet fuse box which were making intermittent contact after slightly melting from the heat.

The fuses were the cause either from incorrect heat resistance, because they were corroded or the pins that hold them in weren't bent enough in the right direction.

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