1990 7.3 NON TURBO

Here is where I am at. I have done the pinpoint test out of the Ford manual first time

WAIT TO START LIGHT TEST disconnected connector run jumper to harness side to ground light on

QUICK GLOw PLUG TEST with test light. All good

POWER good

IGNITION POWER good

POWER TO WHITE WIRE good

POWER TO GLOBAL PLUG none

TEST LIGHT FROM BATT OPS TO GLOBAL PLUS TERMINAL no light but here relay click on/off every time I touched it. Temp was about 50.

I ordered a glow plug controller/relay installed new controller.

Still no wait to start light and no relay clicking.

REPLACEMENT TEST

WTS same, POWER TO RELAY same , POWER TO IGNITION same, NO POWER TO GLOBAL PLUG TERMINAL.

I ran a jumper to white wire heard relay click and heard cycling for a few seconds never get a WTS

Did I get a bad controller any help would be great.

Also PO BYPASSED CONNECT OR AT FENDER.

 

I'm not sure I understand what you're trying to say here. Are you saying the light worked when you ran a jumper to it?

Three things come to my mind just reading your post:

The bulb, unless you did get it to come on, like I said, not sure what was said in that statement.

A fusible link. Not too familiar with the wiring on these trucks yet, as I haven't quite dug into mine yet. But most circuits have at least one fusible link from my understanding.

Check the resistance in the wires to the light, ground or positive, along with any connections. After I moved mine to behind the house for the winter, I found a ground wire in the garage. These trucks are old, and it is not unusual for things to mysteriously fail.

 

MG
The light does come on when jumpered. There is no noticeable voltage drop between battery and post on relay. I am not getting power out to the Gp with either the old controler or the new one.

 

Ok did some more testing. I was on the diesel oring site. I did test they recommend.

VOLTAGE
Battery to chassis 11.7
Battery 11.7
Chassis to gp hot all time post 11.7
Chassis to ignition terminal 11.7
Ran temp ground from chassis to other small terminal (white wire) heand relay click
no power at other large terminal.
Voltage was down some from where I forgot to turn key off when I took a break.

This is the same problem I had with the old controller (International)

 

If you are saying you hear the relay click and youhave power to only one big terminal then the relay is bad.

 

That what I was thinking but the bad old one and the new one doing same thing is what was throwing me.