dstang97
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How come the st85 are so much money? napa wants 65 dollars. What is the difference from using a dog head relay or any other starter relay?
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There's a guy on Ebay selling them for $9.00 each. I bought one 10,000 miles ago, and it still works like it should. Just look up 'cucv glow plug solenoid'. Hope this helps.
So the ST85 is the correct one( always) because of the isolated ground?The term "Ford relay" is very confusing and misleading.
The important thing with the glow plug relay is, it needs to have an isolated from ground(chassis) coil.
The original glow plug controller switches the negative/ground to the relay coil. Positive/+ is always "on" on the relay coil.
Normal "Ford" starter relays are grounded through their chassis/mounting bolt. They are not compatible with the original CUCV glow plug controller. If the relay has an "S" and "I" next to the small terminals, it is most likely NOT compatable forth the CUCV GP system.
Test any relay before you install it, to be sure. It cannot have any continuity between either small terminals, to ground/chassis/ it's mount ears.
If you install the wrong relay, you may ruin your controller card and also burn out your glow plugs.
hey and Hello again, you are saying....? the st85 will be right reading for the controller card output?One other tid bit of info to consider. The Glow Plug Controller card is designed for a specific range of output load(the relay coil). You could see a variation in performance, depending on how far from OE spec, your relay coil is(if you choose any old relay).
What do you think about the gpr100?The st85 has proven to work well.