View Full Version : 4d55t Coolant Temp Sensor wiring
Relevant10
01-02-2025, 11:01 PM
So I’m finishing a 1985 ford ranger project with a 4d55t that someone had before me and I’m trying to figure out the wiring for the coolant temp sensor. I just need to know what color wires go where. It’s a 2 prong sensor and I’m pretty sure one wire goes to glow plug controller and the other to the temp gauge but I can’t figure out what wires it is. I don’t have any with a plug or anything. A wiring diagram would help a lot.
camoit
01-03-2025, 05:50 PM
Use a volt meter to see if it has a resintance range. Because it might be 2 wires to 2 different controllers. Or it could be line in and line out.
I thought we had a manual in the manual section for the 4D55
Manual link. http://www.mightyram50.net/d-50/Factory_Manual/manuals/Engine_Manuals/Diesel_Engine_Manuals.zip
It can be found in this thread.
http://www.mightyram50.net/vbulletin/showthread.php/811-2nd-Gen-Manual-and-216-other-Manuals
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