Ron Lang
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| posted on 19/2/17 at 09:10 AM |
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Junior timer pinouts
I'm almost ready to test out my home made engine harness. The only thing delaying me now is working out how some of the connectors should be
wired.
Air temp and water temp sensors have 2 pin junior timers - does it matter which pin is which?
The coil pack and TPS have three pin connectors and I have no idea which pin is which. From memory, the middle pin is power but I'm not sure.
I'm using bullet connectors so I can swap them about but with 4 connectors in question the number of iterations I might have to go through to
get it right (and engine started) are a little prohibitive. Note I am crimping connectors onto existing connector wires but there doesn't appear
to be any commonality between the colours used on each connector - for example if they all had a black wire and a yellow wire it would be easier.
A forum member kindly gave me some advice on this previously and a handy guide identifying the various ford connectors. However this only shows what
colour wires were used for each pin in factory installations, not what those colours went to. David, I think you didn't have a theory on this -
would you mind sharing?
Any help appreciated.
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r1_pete
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| posted on 19/2/17 at 11:20 AM |
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Coolant and air temp are just variable resistors and dont matter, unless the coolant is dual purpose and the body is earthed - rare on 2 pin
sensors.
Tps, centre is usually the wiper (signal) the outers are + & - you,ll need to work out which is which, there are a couple of paragraphs in the
megasquirt manual about how ro do this.
Coil, pin 2 on the ford 4 cyl is +
[Edited on 19/2/17 by r1_pete]
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turnipfarmer
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| posted on 19/2/17 at 01:44 PM |
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Hello again Ron!
I'll check up & get back to you!
David
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turnipfarmer
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| posted on 19/2/17 at 09:02 PM |
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Ok then...
Mainwire colour (broadly speaking):
Red, Yellow, Green, Orange ... power in some shape or form
Brown, Black ... earth
White ... sensor signal
Should have said before - Pete is right re the pin numbers.
What I can add is that TPS pin 1 is earth, pin 3 is power
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