clyde 1800

no power going to the starter
where does this wire lead to?
car starts when i bridge the starter
i dont really want to put a push button in but i will if i cant find the problem

cabriolet

little wire? what car?

clyde 1800

sierra twincam
has anybody got a wiring diagram?

martysmartie

iTrader: (1)

It's just a live feed supplied via ignition pos 3, usually has a round black rubber connector which fits onto a stud on the starter?

Martin

clyde 1800

could there be any breaks? i will have to take apart my dash again and follow it
ignition lights on but no power to the starter when turned full way
the starter is fine and a wire run from the spud to the battery turns over no problem

JFB Tech

Have a look at the single plug just by the front of the battery tray, this is the starter solenoid wire from the car loom down to the starter. It could also be the starter inhibitor relay (not just on automatics like the Haynes book of lies says), IIRC, it is the big relay, front left of the fusebox. Mine quit the other day, it would crank if you flashed the starter direct from the battery but not turn on the key.

martysmartie

iTrader: (1)

An inhibitor switch is ONLY on automatics to prevent them starting in gear, the relay you refer to is the starter relay and something totally different.

Also I assume this was on a different car, as OP'S car does not have a starter relay.

Martin

JFB Tech

Martin, it's correct that only the auto cars have the inhibitor SWITCH but manual DOHC cars from 1990 on have the same relay XII but it is fed from the EEC IV ECU instead of the inhibitor switch. I know earlier cars had a jumper in the fuse box and no relay.

Both of my 1992 manual cars have this relay, the estate is DOHC and the 2.9 twin turbo used to be DOHC.

The wiring diagrams in the Haynes book show the relay for auto or a jumper for manual and label the relay as Auto Trans Relay XII.

I'm not 100% on the position in the fusebox but relay XII is identified on the diagram in the fusebox lid.

clyde 1800

i swapped all the relays with a sister car but no joy
but right enough you may be on to something with the switch for the automatics

see the car was pinto originally so i totally rewired the whole thing for a twincam engine every piece of loom was changed

the donor car was a twincam hatchback diff car that was wrecked and the engine had blown
it had a manual box in it but the sump was an automatic sump grinded back so the starter would fit

clyde 1800

martysmartie

iTrader: (1)

That makes sense now

OP, so you think the donor car was originally an automatic, if so you probably bypassed the switch when it was converted, something you haven't replicated when moving the loom over, perhaps?

Martin

clyde 1800

i bought the red car as a non runner and with a switch wired into the dash for the starter
so i dont think the man bothered fixing the problem where is this switch situated marty?

martysmartie

iTrader: (1)

If it was auto the switch would have been on the box itself, so is there any wiring around there?

If so you just need to bridge the connections.

Martin

RichieST

iTrader: (2)

What you could always do is run a new wire from position 3 of the ignition switch straight to the starter relay live trigger feed, thus bypassing any starter inhibitor switch etc.

clyde 1800

id say theyve just disconnected the gearbox wiring off at the plug behind the engine
thanks for all the help folks id say the plug going to the car has maybe extra wires whereas the wire going to the gearbox doesnt
is this just a matter if cramping these extra wires together before the plug?

martysmartie

iTrader: (1)

Yes so as to complete the circuit, or as said run another wire, but personally I would want to sort the OE wiring.

Martin

clyde 1800

thankyou i will try this after work tomorrow and post up how it goes

clyde 1800

clyde 1800

ok so thanks to you guys i found the problem
what i done was unplugged the gearbox wire and just as you can see eliminated one at a time trial and error
it turned out to be the brown matches to the brown with white stripe for anybody who has this issue in the future