My sort-of restoration

[GRN_VAGN]

looks horrid :S
a 185 i reckon would look good,

Car is looking good mate

[Preen59]

Those tyres look a bit silly. But hey, your car..

[GoLfMan]

I recon it looks pretty cool A whole lot of stretch though haha

[GeorgeMK1]

Hey guys how exactly does the fan system work.

My switch/sensor on the side of the fan was faulty, so i got a new one. I re-wired a relay that was separate from the loom, and the cars wiring in general. I Ran the switch of the relay to one of the plugs to the fan switch on the side of the fan, and the other plug from the water temp sensor to ground. I warmed up the engine, and im pretty sure it surpassed 95deg however the fan still didnt turn on

Im guessing that, as the relay is 12v, maybe the switch/temp sensor or the side of the fan is sending higher, or lower volts or something.

LOL someone help

[GRN_VAGN]

normally there is a positive wire that goes from fuse box to the sensor on the radiator,
Then from that sensor a positive wire to the fan, then a earth from the fan to chassis. easy.

To bypass it, you put positive from fan to a relay, hook relay up to ignition, earth, and a switch on dash. Downside to this you will most likely forget to turn it on, and off.

There is a few universal kits out there, Craig Davies i think, has some. with a sensor probe in top hose, relay, ect.

[GeorgeMK1]

So the sensor on the radiotor is a water temp sensor? Not an actual actuator of the fan?

Oh i see. Yep i used to have a switch on my dash, but got sick of it, and wanted to get it back to original.. but am finding it a little hard

[GRN_VAGN]

So the sensor on the radiotor is a water temp sensor?

Its a switch sorry, well a sensor too, as it should have 85 degree ish written on it, , Needs power to trigger it though, so its not a earth switch

[gldgti]

whoa! still sounds vague.

the switch on the radiator is a normal everyday continuity switch that switches on above the temp written on the switch.
if you want to wire in a relay, so that the full fan current isnt going through the fuse box ( a good idea, and what the OP has said he tried to do) then all you do is run +12V to the fan switch on the radiator, and run that to the relay that is switching the fan on and off.

The only things that go to ground are the fan and the relay ground wire.

the way you described it in your original post, sounds like when water temp gets high enough the switch will just earth out the 12V... not good!

[GRN_VAGN]

mine have always been setup that way,
The switch on the side of radiator uses power from fusebox, so as soon as the switch closes, BAMM, fan on. Easy.

BTW, you should be able to use the switch on side of radiator on the earth side of the Relay. Well i cant see why not anyway.

Have the power wire from battery to Relay, then from relay to fan. earth the fan to chassis, wire relay to a 12v source that goes on with ignition, then earth relay using switch on radiator. soon as it gets hot, the switch will close and complete the circuit. = Fan

Thats how id do it anyway, dunno if its right though. I dont like idea of Power going through a switch thats on your dash. rather use a switch on the earth.

[GRN_VAGN]

this diagram could help



Always use a fuse from battery to relay though, 20 amp should do