How are you testing for voltage at the pump? You will only get voltage when you crank the engine. No voltage with just key ON.

Here are the basic tests if the engine is not firing at all when cranking:


0. Pull the relay out.

1. Test pin 11 for ground.

2. With key ON, test pin 8 for 12V

3. Jump pins 7 and 8 on the socket with a piece of #12 wire. Pump should run. If it doesn't then it's most likely a wiring problem between the relay and the pump. Be sure you have ground at the pump.

4. Put a meter or test lamp between 11 and 12, and see if you have current when you crank the starter. If no current, fix the wiring problem - I believe 12 gets current from the purple wire that runs from the big connector on the right fender well (where the batter is connected).

If these four tests are OK, you need a new relay.

Good luck.

If the

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe