I am having an issue with my fan switch not turning on. A little back ground first: 1986 GT 3.4L. In the vegas heat, as long as I keep moving my car runs well below 200 (according to the gauge) . As soon as i encounter traffic slow down, it starts to heat up and moves right up the scale. I just had to replace the radiator due to a severe heat day and an accident on the freeway (POP). First thing I noticed is the fan was not on. I removed the connector on the fan switch and shorted the lead and the fan came on. I replaced the switch and the rad and it started to over heat the very next day; no fan. The only thing I can think of is either the new switch is also bad, or teflon tape is not allowing the switch to ground out. Any help is appreciated.

Peace!!
B2

------------------
Peace!!

B2 OUT!!
86GT 3.4LProject

I do hear the guys on this site saying to avoid teflon tape for that very reason ....most of the components like that come new with a type of sealant that doesn't prevent the electrical connection. I would spin the switch back out and get rid of that tape. Also you might want to go with a lower temp switch and get that fan spinning sooner since you are in such a hot area (if you haven't already)

[This message has been edited by 92wastheyear (edited 08-03-2013).]

Yep,that is what I thought. After pulling the old one out and then reading the description on how the circuit works, I had that same thought. I will try removing the teflon and see if that is the culprit. Thank you!!

Peace!!
B2

Apparently, that was the issue. However, as I was removing the old switch, it twisted in half leaving me to believe that there were other issues with it as well. The new switch was installed sans teflon and using a small amount of non hardening permatex on the upper half of the threads. This method was successful. All is working as it should. I appreciate the advice and assistance.

Peace!!
B2

The fan kicks on at 220 degrees,but because you live in vegas Ide install a manual fan switch. Find the Green wire with the white stripe at the fan relay, under the drivers head light. Buy some wire and and a 12v switch, one end of your new wire is patched into the green wire with the whie stripe,do not cut the green and white wire in half, patch into it, the other end of your new switch wireing goes to ground. You can now turn on the fan when ever you want. When your new switch is in the off position, your fan will function normally as befor.