I am not familiar with your particular vehicle, but a three wire, two
contact device is not uncommon. (Since you indicate there are contacts, I
doubt it is a solid state relay.)
I would suggest that one wire is to control/energize the solenoid, while
the
other two, probably heavier gauge wire , would be to each of the contacts
so
therefore carry the heavier current to the load.
The return path for the current to energize the solenoid is usually
through
the vehicle's chassis/ground. If there is a metal mounting bracket
secured
by a metal bolt or screw, then check the resistance from that mounting
bracket to each of the wires to determine which is the solenoid control
wire.
Good luck with resolving whatever your problem is with the vehicle.
Bob
<mhs@[EMAIL PROTECTED]
> wrote in message
news:1e92a3e2-c3f0-4849-add4-a88c2fdf191f@[EMAIL PROTECTED]
> Good morning world,
>
> I have a Mitusubi**** Chariot build around 1995 which has ro relays
> attached to the positive battery terminal,
> one being market as "Fan relay 40 Amp's" the other as "Glow Plug relay
> 80 Amps".
>
> Now, while I can understand the circuit now, I have problems to
> understand how those 2 "relays" work.
>
> They are three wire devices, but have only two contacts, I can see no
> contacts for a coil etc. can somebody tell me how these relays work ?
> Are they perhaps solid state ?
>
> Your help and guidance is much appreciated ?
>
> Kind regards
>
> Al:
> ----
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