I might have a snag.

It was cold and rainy last night. When I went out this morning and turned the key to run the fan started up. I checked under the hood and it was pretty moist and there was a puddle around the distributor.

I'm going to wait until things dry out a bit as I'm not quite done with my wiring adventures and I have some loose wires still and others aren't permanently spliced yet. If it still persists I'll start trouble shooting and making sure everything is sealed tightly. I do have spares of almost every component as well.

I might have to replace my upper radiator hose as it has been seeping around the thermostat housing no matter how tight I clamp it. I might also have to get some old fashioned pipe dope if the teflon tape isn't holding.

I'm just happy I wired in the key on relay or may battery would have been completely drained and would have been a major pain.

 

A little progress on the fan. I unhooked the plug from the temp switch and the fan stopped running. I know that sounds obvious but there are a few other places that the circuit could short out and run with the switch unplugged. I verified switch failure by plugging in another switch and not having the fan turn on.

Well this is an informative exercise, I now know if the switch fails it will default to being closed and run the fan regardless of temp, a plus in my book.

It also tells me to keep a spare on hand, not like I didn't already since they are wrecking yard electrical parts. Not a big problem since I only pay like $2-3 for them. It is just a pain since I have to drain the radiator again.

I also literally have a pile of Volvo relays. They are easier to test and I have only had one bad one since I started to hoard them. I picked up 4 of them today.

 

OK so this turned out to be a winter hiatus. I got it sorted out over the past 2 weeks. I put another temp switch in and it's been working fine. I most likely tweaked the gauge a little when I put in the LEDs as it seems to read little hotter than I thought it would, both when the thermostat opens and the fan turns on. Anyway, it's been working great. I was digging around in the garage today and found a lower range switch I had forgot I had so I'll put that in if I get too nervous about the kick in temp for the fan.

Here are pics of the final result.





I had some starter issues today so I just used a jumper wire to test the LEDs.

Low:



High:



This is how it will actually look like if the fan kicks into high while operating. I grabbed a heat gun and plugged in the low temp switch I mentioned in order to test it.