Date: Thu, 25 Mar 2004 23:34:50 +0100 From: "MH" <nomailnospamere.no> Subject: Re: 1988 saab 900
> Remove fuel pump, check for power at terminal 86. of the relay > If that's ok, test across > terminals 86 and 85 with a digital voltmeter- should give 12V when ignition is > turned to "start." If that's ok, voltage applied across terminals 85 (-) and 86 > (+) should make the relay "click," and also give continuity between terminals > 30 and 87b. (for 16 valve, 8 valve is slightly different) and give continuity between 30 and 87 at the same time (30 is +12V unswitched) 87b feeds +12V to both fuel pumps (thick gray/red wire) 87 feeds +12V to injectors (green wire) and (blue/red) wire to lambda sensor pre heat. ECM pin 9 connects to main fuel injection relay (87) and through turbo switch to fuel pump relay terminal 86 ECM pin 17 connects to fuel pump relay 85 (violet wire) The turbo over pressure (break) switch cuts power to contact 86 (brown/white wire), opening the relay and stopping the fuel pumps. > ... You should get a Bentley manual though. any manual is better than no manual -------- MH '72 97 '77 96 '78 95 '79 96 '87 900T8