Mike,
I also had a fan problem, and with help from the list, sorted out the main
difficulty (which was a priceless piece of DPO'ism -- the thermo switch
wires were affixed to the horn, and the horn wires to the switch!!!) but I
digress.
The cct contains a thermo switch and a relay, as well as the fan
itself. The thermo switch is fed by ign feed that is routed to the relay,
I think (at work and cct diagram at home) -- upon operation of the switch,
the relay will be energised and the fan will run. The relay is mounted on
top of the horn relay, and both are fixed by a singe self tapper up near
the speedometer. If you look up into the dash, they are very close to the
outside of the car. The fan motor is protected by an inline fuse (ours was
just above the ignition switch) so you may need to check that as well.
Some where on the web, there is a page that has the cct diagram for the
1980 Spit that will give you much more info -- found it
http://www.enteract.com/~vmichael/tech.html
Good luck
Tony
>Greetings All,
>
>My newly acquired '79 Spitfire has the front leaning radiator and electric
>fan combination. The PO had disconnected the thermo switch on the radiator,
>combined the two wires and spliced in some wires that ran back to a switch
>under the dash. Consequently, the fan was either 'always on' or 'always
>off' (manually overridden.)
>
>When I first started driving the car, the fan would come on when the
>ignition would be in the 'on' position. Shortly after, (2nd or 3rd evening
>ride) the fan didn't come on at all, and I managed to make it home about the
>time the temp gauge read 240 degrees. So, I started investigating the
>electronic situation at that point, which is when I discovered the wire back
>to the under-dash switch. It had gotten caught on the steering shaft, and
>tore apart. I fixed it, tucked it in better (those wire ties are great) and
>I was back to his configuration. (I planned on rewiring the thermo switch
>back in, and doing away with the over-ride switch.
>
>Now my problem, I can't read the schematic on page 266 of my Haynes manual,
>(I'm clueless) and I need to know how to rewire back to the way it SHOULD
>be.
>
>After removing his bullet splices, and yards of cheap electrical tape, I
>have two wires that come from the fan, two that lead to the thermal switch,
>and two that presumably connect to the fan's two wires? I rewired it the
>way I believed it should be, and no fan.
>
>At this point, I'm begging for ideas or help. I even reconnected it back to
>its previous condition, and still no fan. Using my cheap ohm meter, the two
>wires from the fan will peg the meter. the two wires going to the thermal
>switch will peg the meter, but the two remaining wires in the wire loom,
>(they presumable go to the fan's wires) will not budge the meter at all.
>
>Please, anyone?
>
>Mike
>Omaha
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