I'm not sure how to test it on the vehicle, what I've always done in the past to test 12V relays is make a "harness" (a couple wires and some female spade connectors) to plug into the coil side of the relay. I then just hook the other end of the harness into the car battery and check the continuity of the switch side of the relay.
I'll admit I'm also not the best at deciphering wire diagrams, but it seems to me that the B+ power starts at the 15 AMP EFI fuse in the underhood fuse box, then through the EFI Main Relay (which I believe is also in that fuse box). The more I'm reading, the more I'm starting to think that I may have jumped the gun on suggesting the circuit opening relay, as it seems the contacts are only closed while starting and while air is moving through the AFM.
__________________
1989 7MGTE R154 Targa Top White Package w/Blue Interior
Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels
|