ignition solenoid issues
Posting Guru
Joined: Jan 2002
Posts: 1,346
Likes: 8
From: Baltimore
I'm still confused. 
There are 4 wires at the EEC relay socket. In your picture you show 4 wires.
You mention a small Yellow wire. Are you saying you have two Yellow wires?
Red wire supplies 12 volts to the circuit when the relay is energized.
Yellow is the 12 volt source for the Red wire.
Black wire is ground for the primary relay coil.
White/Light Blue is the 12 volts for the primary relay coil.
Normal operation relay installed. Doesn't matter if EEC connector plug is plugged in or not
Ignition Off.
Yellow wire 12 volts.
Red wire 0 volts.
Ignition On
Yellow wire 12 volts.
Red wire 12 volts.
White/Light Blue wire 12 volts.
There are 4 wires at the EEC relay socket. In your picture you show 4 wires.
You mention a small Yellow wire. Are you saying you have two Yellow wires?
Red wire supplies 12 volts to the circuit when the relay is energized.
Yellow is the 12 volt source for the Red wire.
Black wire is ground for the primary relay coil.
White/Light Blue is the 12 volts for the primary relay coil.
Normal operation relay installed. Doesn't matter if EEC connector plug is plugged in or not
Ignition Off.
Yellow wire 12 volts.
Red wire 0 volts.
Ignition On
Yellow wire 12 volts.
Red wire 12 volts.
White/Light Blue wire 12 volts.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
In post #25 that is not the power relay, it is the fuel pump relay in those images.
Those are normal voltages for that fuel pump relay that is not picked.
That is why you should not use a DVM in the fuel circuit. Always use a loading test light.
Those are normal voltages for that fuel pump relay that is not picked.
That is why you should not use a DVM in the fuel circuit. Always use a loading test light.
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Senior User
Joined: Jul 2011
Posts: 137
Likes: 0
This is the other relay, the wire with the alligator clip a t pin corroded and broke off about a week ago I have to order the plug still to fix it
0.3 MV on the blue wire
12.24v on the yellow wire
26.0 MV on the smaller black wire
12.24 volts on the black alligator clip wire I didn't alter this wire just crimped the alligator clip on
Posting Guru
Joined: Jan 2002
Posts: 1,346
Likes: 8
From: Baltimore
The relay with the Green colored base is for the fuel pump relay.
The relay with the Brown colored base is for the EEC relay.
I believe the relays look similar but the pin connections on the relays are different.
Are you sure you have the original EEC relay plugged into the relay socket with the Brown colored base?
I think you mentioned the relays stopped energizing. Probably because of the relay mix up.
I also noticed on the EEC relay in your picture the Blue wire goes a couple of inches to a fusible link and turns into a Red wire. The schematics show the wire as always Red.
Plug the EEC connector back on.
You have to get the relay problem straightened out and then verify if you still have voltage on pin 40 and 60.
Need to take a step backwards before you can move forward.
The relay with the Brown colored base is for the EEC relay.
I believe the relays look similar but the pin connections on the relays are different.
Are you sure you have the original EEC relay plugged into the relay socket with the Brown colored base?
I think you mentioned the relays stopped energizing. Probably because of the relay mix up.
I also noticed on the EEC relay in your picture the Blue wire goes a couple of inches to a fusible link and turns into a Red wire. The schematics show the wire as always Red.
Plug the EEC connector back on.
You have to get the relay problem straightened out and then verify if you still have voltage on pin 40 and 60.
Need to take a step backwards before you can move forward.
Thread Starter
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Senior User
Joined: Jul 2011
Posts: 137
Likes: 0
New relay in place and energizing, still 9 volts at 40 and 60 and my fuel pump relay only turns on when back probing the small yellow wire and its in the 6 to 8 volt range
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Posting Guru
Joined: Jan 2002
Posts: 1,346
Likes: 8
From: Baltimore
When you turn the ignition On what is the voltage on the Red fusible link wire that is Blue at the EEC socket?
Measure the voltage this way.
Ignition On
With the relay installed. At the EEC relay socket back probe the Blue wire with your red meter lead probe.
Use the Black meter lead probe and back probe the Black wire at the EEC relay socket.
Note the voltage.
Then move the Black probe to the negative Battery terminal post.
The voltage reading should be the same which is (12 volts).
This verifies the ground wire to the relay is good.
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Senior User
Joined: Jul 2011
Posts: 137
Likes: 0
Well I went to get my base reading and when I inserted the red probe I brushed the black alligator clip wire, blowing the relay and now I have 11.39 volts from the small black wire that's supposed to be the ground with and without the relay and I have 3.49 volts on the blue wire with and without the relay
Posting Guru
Joined: Jan 2002
Posts: 1,346
Likes: 8
From: Baltimore
Well I went to get my base reading and when I inserted the red probe I brushed the black alligator clip wire, blowing the relay and now I have 11.39 volts from the small black wire that's supposed to be the ground with and without the relay and I have 3.49 volts on the blue wire with and without the relay
With the EEC relay unplugged you need to verify you have 12 volts on the Yellow wire.
This wire is Hot at all times. Doesn't matter if the ignition is On or Off. It's a 18 Gage fusible link Brown colored at the battery
side of the starter solenoid. This wire also powers the ignition switch.
If 12 volts is on the Yellow wire, turn the ignition On and verify you have 12 volts on the White/Light Blue wire at the EEC socket.
The 12 volts comes from a 20 Gage Blue fusible link D. It appears the fusible link is in the engine compartment and comes from connector C100 (53 pin connector) firewall bulkhead connector, a Red/Light Green wire. After the fusible link the wire color changes to White/Light Blue and then to the EEC relay. It also powers the coil and TFI module.
You must be missing one of these voltages.
If both voltages are there use you ohm meter and with the relay removed measure the resistance of the relay coil. These
would be the relay pins where the White/light Blue wire and the Black wire go to. I would think around 20 ohms.
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