soopsoop Posted February 13, 2015 Share Posted February 13, 2015 took fuel pump off to check to see if it worked.broke all three mounting screws,damn,fuel pump works if you apply power directly,traced it back to fuse box,with the key on no power to the fuel pump fuse. does it get its power from the ing switch or does it go through the relay first or is there a oil pressure switch first. my car is an 88 wagon dl. Link to comment Share on other sites More sharing options...
ihscout54 Posted February 13, 2015 Share Posted February 13, 2015 The ecm uses a signal from the CAS (distributor) to trigger the pumps relay. It wont pump unless the engine is spinning. These cars do not have a priming cycle. Without looking at a wiring diagram I cannot tell you for sure if the fuse gets its power from the ign relay or whatever. I do belive It fed from one of the fuseable links direct off the battery. Its not hard to check these. Link to comment Share on other sites More sharing options...
Gloyale Posted February 13, 2015 Share Posted February 13, 2015 There should be 12v + at fuse 11 with key on. That fuse supplies the power to the relay. ECU grounds relay during cranking, which then powers the fuel pump. If that fuse has power, then the problem is you aren't getting Distributor pulse. Test fuel pump by connecting green "test" connectors and turning key on. Fuel pump should cycle. Link to comment Share on other sites More sharing options...
ihscout54 Posted February 13, 2015 Share Posted February 13, 2015 Good tip (gloyale) on the test connectors. Dont forget to test the relay. Link to comment Share on other sites More sharing options...
soopsoop Posted February 14, 2015 Author Share Posted February 14, 2015 i will try that next where are those test connectors exactly Link to comment Share on other sites More sharing options...
Gloyale Posted February 15, 2015 Share Posted February 15, 2015 i will try that next where are those test connectors exactly Enigine bay at the firewall driver side. Near fuel filter and Wiper motor. Green for Test White for Read Both for Clear Link to comment Share on other sites More sharing options...
soopsoop Posted February 17, 2015 Author Share Posted February 17, 2015 got it i will try that out tomarrow. had to fix mothers car first. Link to comment Share on other sites More sharing options...
soopsoop Posted February 21, 2015 Author Share Posted February 21, 2015 got the fuel pump working now it was a bad relay,i put a used one in there for now,all i need now is spark and the wiring for the ac heater fan someone cut up the wiring and tried to bypass the resistores. Link to comment Share on other sites More sharing options...
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