electrical help. relay??
Thread Starter
Intermediate
Joined: Oct 2012
Posts: 25
Likes: 0
electrical help. relay??
So I was thinking I was having an intermittent relay problem. but now I am not sure. What was happening is the fuel pump was not kicking on all the time I related this to when the relay would click on and off. Couple times as i was driving I assume vibrations cut it off cause the motor would lose power. Then come back all of a sudden.
Ok so what I did today was test some stuff.
The fuel relay I am assuming was replaced by the previous owner. Oryliey said that it should be a 5 pin relay. It now has a 4 pin relay #h270. From the relay there was one exposed wire not connected to anything. I'll call this wire 4.
Using a test light connected to the NEG and the ignition off I found 1 is constant power to a fuse that was wired to 1 wire is bridge to a thing that was connected to the battery. Pin 2,3,4 nothing.
Now with the ignition on wires 2,3 light up. 4 nothing.
Light connected to POS on battery and ignition on pin 4. It lights up.
If I get the car started and unplug the battery the car still runs.
I don't even make sense to me but if someone knows what is happening let me know.
Any idea??
Ok so what I did today was test some stuff.
The fuel relay I am assuming was replaced by the previous owner. Oryliey said that it should be a 5 pin relay. It now has a 4 pin relay #h270. From the relay there was one exposed wire not connected to anything. I'll call this wire 4.
Using a test light connected to the NEG and the ignition off I found 1 is constant power to a fuse that was wired to 1 wire is bridge to a thing that was connected to the battery. Pin 2,3,4 nothing.
Now with the ignition on wires 2,3 light up. 4 nothing.
Light connected to POS on battery and ignition on pin 4. It lights up.
If I get the car started and unplug the battery the car still runs.
I don't even make sense to me but if someone knows what is happening let me know.
Any idea??
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
So I was thinking I was having an intermittent relay problem. but now I am not sure. What was happening is the fuel pump was not kicking on all the time I related this to when the relay would click on and off. Couple times as i was driving I assume vibrations cut it off cause the motor would lose power. Then come back all of a sudden.
Ok so what I did today was test some stuff.
The fuel relay I am assuming was replaced by the previous owner. Oryliey said that it should be a 5 pin relay. It now has a 4 pin relay #h270. From the relay there was one exposed wire not connected to anything. I'll call this wire 4.
Using a test light connected to the NEG and the ignition off I found 1 is constant power to a fuse that was wired to 1 wire is bridge to a thing that was connected to the battery. Pin 2,3,4 nothing.
Now with the ignition on wires 2,3 light up. 4 nothing.
Light connected to POS on battery and ignition on pin 4. It lights up.
If I get the car started and unplug the battery the car still runs.
I don't even make sense to me but if someone knows what is happening let me know.
Any idea??
Ok so what I did today was test some stuff.
The fuel relay I am assuming was replaced by the previous owner. Oryliey said that it should be a 5 pin relay. It now has a 4 pin relay #h270. From the relay there was one exposed wire not connected to anything. I'll call this wire 4.
Using a test light connected to the NEG and the ignition off I found 1 is constant power to a fuse that was wired to 1 wire is bridge to a thing that was connected to the battery. Pin 2,3,4 nothing.
Now with the ignition on wires 2,3 light up. 4 nothing.
Light connected to POS on battery and ignition on pin 4. It lights up.
If I get the car started and unplug the battery the car still runs.
I don't even make sense to me but if someone knows what is happening let me know.
Any idea??
What color is the disconnected wire?
Instructor
Joined: Mar 2013
Posts: 108
Likes: 1
From: Georgia
This is an easy one. The wire coming from your battery is the power needed to supply your pump.
The wire you check when you put your tester to the positive side of the battery is your ground needed for the contactor coil.
When you turn your ignition on. One of the other two wires send power to the contactor coil so it will entergize and close the contacts. This will cause the other wire to be hot and send power to your pump.
This sounds like it is working correctly. One ground , two input hot wires, and one output hot wire.
The wire you check when you put your tester to the positive side of the battery is your ground needed for the contactor coil.
When you turn your ignition on. One of the other two wires send power to the contactor coil so it will entergize and close the contacts. This will cause the other wire to be hot and send power to your pump.
This sounds like it is working correctly. One ground , two input hot wires, and one output hot wire.
