Quote Originally Posted by Busted Syncro View Post
G'day Neil,

The "Otter UK" thermostat is indeed a switch that is normal open (NO) and closes at approx. 130 deg F. If you clean off the dirt their will be a letter and numbers like M54 stamped on the metal frame. That would indicate it will close a 54 deg C or 129 deg F. The numbers will change depending on what temperature it snaps closed at as each one is individual. The bowl the thermostat sits in is filled with a small amount of oil that covers the bottom of the bi-metallic thermostat and used to conduct the heat from the coolant to the bi-metallic thermostat. I have repaired a lot of these!. They are a pain to adjust.

Yes it controls the choke warning light.

Chris
Hello again - returning to the earlier topic that gave rise to the query about the wiring to the Otter switch on the 2.25 litre petrol engine. I mentioned that someone at some time had extended the lead to the temperature sender and connected it to the Otter switch (thereby guaranteeing that it would never work). On my truck there wasn't actually a temperature sender installed but I have since installed one in the expected place on the RHS of the head near the thermostat housing.

Now having installed a fair bit of the replacement Autosparks harness I'm back to reposing one of the questions from earlier in this thread - where is the wire routed from the Otter switch back to the choke on/off switch on the main harness? The wiring diagram just shows a black wire running to earth from one side of the choke on/off switch and no mention of an Otter switch at the earthing point.

Unless I'm doing it wrong the engine harness that came with the Autosparks stuff has just wires for the alternator, oil pressure and temperature senders and these connect to the multi-point block on the main harness that sits above the driver's side foot box. On the main harness there are two leads with connectors branching from the central loom in a common black casing - white/blue and black - which should connect to the two spades on the choke on/off switch. The black wire should be the one that eventually terminates at the Otter switch but it re-enters the harness at the same point that the white/blue wire comes out and I can't see anywhere further down the main harness heading frontwards that has a single black lead with a female spade connector coming out that would sensibly be routed across to the Otter switch.

Anyone actually know where that black earth lead that leaves the Otter switch travels to and finally reconnects to the main harness at the choke on/off switch? Is it independent of the set of wires coming from the alternator that includes the temperature sender (brown/yellow?) and oil pressure sender (white/brown?) wires?

While I'm at it - another puzzle relates to the wiring from the wiper/washer switch to the washer motor. In the main harness there is a group of wires with female spade connectors that go to the windscreen wiper switch. One of these is a light green/black wire that should power the washers - it either attachs to the wiper switch or the washer switch depending on how that is set up. Like the choke on/off switch issue before my problem is that this light green/black wire goes into the main harness central core but I can't see where it actually comes back out of the harness in order to route to the washer motor. I'm not saying that it isn't there but just noting that I've yet to find it. On my truck the washer motor and bottle are fixed to the inner side of the LHS front mudguard so the relevant light green/black wire has a fair path to follow to get to the washer motor. Again, anyone know where it is to be found - perhaps somewhere along the routing of the LHS lights?

Cheers,

Neil