Sometimes a wire can look good but be corroded on the inside. I learned that the hard way

 

even if the multimeter shows no resistance and beeps for continuity across the whole way?

can I get a known good wire and jump it across from pin86 to the pcm connector to double check?

 

Don't confuse yourself, B28 has nothing to do with the fuel pump relay circuit. There is a light green/black that comes from the ignition switch via fuse 9 inside and powers pin 86 at the fuel pump relay and the auto shutdown relay plus some other stuff. This is *not* the same LG/BK you find at the connecter in the pic. Pin 85 is the other side of the relay control and runs brown/white all the way to the PCM. It does have another connector in between which is one of those on the driver side cowl (supposedly a gray connector). With the PCM connector and the relay removed, test the brown/white wire resistance to ground on both sides of the connector at the cowl. That should tell which part of the wiring is bad, if any.

 

That code means the PCM isn't seeing return voltage from the ASD relay, indicating it is on.

If sticking a probe into pin 85 in the relay socket, and the other one to battery ground shows anything other than infinite resistance, there's gotta be a problem there somewhere........

 

P1389 means the PCM didn't sense voltage that the ASD was supposed to turn on. Makes sense given that the fuse for it blew.

Let's try not to add to the confusion by talking about the fuel pump relay and ASD relay together, let's track down one problem then the other.

 

On my PDC pin 85 is a green and black wire... pin86 has the brown and white

 

yea on my pump relay pin 85 which is green and black on my pdc to battery ground shows 9.5ohms

om my ASD relay pin 85 to battery ground shows no reading at all

 

Ok, THAT'S the wire you need to trace then. Suppose it helps if we are talking about the same wire. Guess wire colors shuffled a bit from 96 to 97.

But yeah, wire from pin 85, to connector 137.

 

pin 85 leads to a green and black wire in A2 of the Black pcm connector. And measures .3ohms

which according to alldata shows “fused ignition switch”

 

According to my diagrams, that should be pin 86 on the relay..... Pin 85 is the brown/white wire, that runs back to the pcm.