I am preparing to wire in a aftermarket gauge pod/cluster and was looking at the wiring diagrams for the factory wiring. I ran across a dark green/light green wire for the coolant temp relay. What does this relay do and will I need it?
Coolant Temp Relay
- Thread starter rotorhead22
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There is no coolant relay. The temp sensor is just pin 7 to pin 46.
Can you post a pic of what you are looking at?
Can you post a pic of what you are looking at?
#13 I been looking at about five schematics and don’t see this relay
Attachments
There isn’t one
This is the temp sensor for the ecu
And this is the temp guage for the cluster
I would assume they just mean to tap into the red/white wire from the temp sensor.
This is the temp sensor for the ecu
And this is the temp guage for the cluster
I would assume they just mean to tap into the red/white wire from the temp sensor.
There isn’t one
This is the temp sensor for the ecu
And this is the temp guage for the cluster
I would assume they just mean to tap into the red/white wire from the temp sensor.
Without know king what exactly you are wiring in I can’t really say. The light green/ yellow wire going to pin 7 is for the ECU. The other one only drives the stock temp guage.
Just a straight up cluster. I have removed the wires from the connectors to wire to the pod however that one temp relay wire caught my eye.
Attachments
So here is an interesting one...
I took these from my Chilton Manual, under the 1989 section.
So the first pic is the instrument cluster connectors. The fifth label from the left is labelled 450 - DG/LG, the description says HOT WATER TEMP RELAY TO SENDER. All sounds the same as what the OPs document says. Here is where it gets interesting. I follow the wire in the diagram and it goes directly to the Seat Belt Warning Chime in the second pic where it is labelled 450 - DG/LG and description is SEAT BELT WARN. INDIC. LAMP FEED.
I took these from my Chilton Manual, under the 1989 section.
So the first pic is the instrument cluster connectors. The fifth label from the left is labelled 450 - DG/LG, the description says HOT WATER TEMP RELAY TO SENDER. All sounds the same as what the OPs document says. Here is where it gets interesting. I follow the wire in the diagram and it goes directly to the Seat Belt Warning Chime in the second pic where it is labelled 450 - DG/LG and description is SEAT BELT WARN. INDIC. LAMP FEED.
This is the diagram I have so I wonder if this is a mistake. Do 90 up have electric fans?So here is an interesting one...
I took these from my Chilton Manual, under the 1989 section.
So the first pic is the instrument cluster connectors. The fifth label from the left is labelled 450 - DG/LG, the description says HOT WATER TEMP RELAY TO SENDER. All sounds the same as what the OPs document says. Here is where it gets interesting. I follow the wire in the diagram and it goes directly to the Seat Belt Warning Chime in the second pic where it is labelled 450 - DG/LG and description is SEAT BELT WARN. INDIC. LAMP FEED.
Only the 2.3L has a cooling fan relay. The temp sensor is still wired like the 5.0.
I’ve pulled these harnesses apart. There is no relay. It’s a simple resistance sensor. A relay doesn’t even make sense electrically speaking
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