A simple one, perhaps...

My '76 4/4 has a Kenlowe fan fitted. The relay is playing up, so the fan runs a lot of the time (unless going over a bump makes the relay drop out... Another bump usually brings it back on though!).
There is a mnaual switch under the dash, which works, so I plan to do away with the relay for the present (or perhaps permanently, just relying on the good old switch and observance of the temp gauge...

Many years ago I fitted virtually the same Kenlowe (has a temp sensor on a long copper tube which fits into the radiator top hose) to my MGB, but I suspect the paperwork (and wiring diagram) went with the car when I sold it. Can anyone remember whether switch/relay were wired in parallel, or whether the switch also controlled the relay to power the fan?

I don't want to drive to Derbyshire on Saturday and Gurston on Sunday with the fan permanently running...

Cheers,

Graham, the sensor relay and the switch work independently. If you should need the paperwork and wiring diagram I can try to find them in my rubbish and send you a scan.

A long time ago I did away with the sensor and the tube (the relay is still there) because the rubber "bridge" for entering the tube into the hose started to leak. New Kenlowes have the sensor on the outside of the radiator, taking the temperature by contact with the metal. I would prefer that but am in doubt that they will sell it separately.

BTW there was also a "flying fuse" in the set.

Frank

Thanks Frank.
I'll get my test meter out tonight and pull the relay connections. If you do come across the paperwork a scanned copy would be appreciated, but there is no hurry!

Meanwhile, I'll checkout Kenlowe for a newer temp sensor/relay setup...

Cheers,

Just fit a new relay and switch through that - easily done through earth. EG piggy back both live feeds from the single supply - then accessory supply to fan - earth from relay to switch to earth.

That was the plan if the switch controlled the relay Dave.
However, it would appear not. I'll check tonight before heading to the local radio club meet. The Kenlowe switch seems pretty robust.
Having looked at their web site, they are still doing sensor in top hose, so might see if they'll sell sensor/relay without all the rest of the kit - for when I forget to look at the temp gauge!

Please may I piggyback on this as I'd like to add a manual over-ride switch into my OTTER switch circuit before we go touring in France later in the summer. I know it's just a simple jumper across the two contact points, and I'd like to put an in-line warning light alongside the switch (to remind me I've forgotten to turn it off!) but should I add a relay into that circuit and if so, how? I'm inclined to instal a relay if sensible just to keep hot wires away from the cab
Answers on KISS principle please; never quite grasped all this electricity stuff at school. Many thanks

When you say "Otter" do you mean the brand as fitted to the Rover V8? If so, all the Otters I've seen have one terminal. If you earth that terminal the fans will run. So you can piggy back from that terminal to a switch and then to earth. A tidier solution though is to trace the Otter lead back to the relay (on MGBV8's the wire is black with an orange trace from memory). Then piggy back from the relay terminal which goes to the Otter - via a switch to earth. In this situation a second relay isn't necessary. Fitting a warning light on an earth switch is not simple - you'd at least have to run a live feed from the fusebox to the lamp and then to the switch. I suggest you seek help with that, to avoid red hot and melting wires, which is no fun at all.

Kenlowe: Relay is two wire and on the earth side of the fan motor (at least that's how RTA is wired!).
So, disconnected the lead from relay to earth leaving the other wire, going to the motor, in place. Switch works, it's just the driver who forgets to switch things on

Cheers,

There's a thread on the GoMog site at http://www.gomog.com/allmorgan/bypass.html
which I was going to follow as looks reasonably IdiotProof, but then I spotted "fit a relay" and began to panic
This suggests that the Otter switch can be "jumped" by switching separately across the power in and out terminals, so I was thinking of doing just that but adding an in-line warning light as well. And then I thought, relay, but still not sure where to start, so this thread is still open for further thoughts please

Which model (of Morgan)?
Now for the silly question - have you a circuit/wiring diagram?
Are you anywhere near Gloucestershire?

Cheers,