Engines cranks over as soon as the battery is connected

[SWR Banned Find all posts View Profile Close SWR]

Gday Mike-4103

Ok so if I take the relay out it stops cranking

I reckon there is a very good chance that the contacts on the relay have fused together!

You need to eliminate the relay as the fault!

My reason for pointing at relay is because it has over ridden the inhibitor switch but stops when pulling relay out so also rules out the armature on the starter!

[Mike-4103 Junior Member Find all posts View Profile Close Mike-4103]

The relay has 12v on the switch terminals at all times

I wish it was that easy

[SWR Banned Find all posts View Profile Close SWR]

The relay has 12v on the switch terminals at all times

I don't have a wiring diagram so I'm out of the run on this one!

Depending on the configuration of the wiring some times there is constant live that is given an earth so there is no arking on the inhibitor switch.

A wiring diagram would confirm this!

Run a power supply to the relay to make sure that it is energising the contacts then check for open/closed circuit across those contacts then the relay can be definitely ruled out!

[Mike-4103 Junior Member Find all posts View Profile Close Mike-4103]

Yes tested to see earth switching as well

[MacroP Member Find all posts View Profile Close MacroP]

The relay has 12v on the switch terminals at all times

I wish it was that easy

There should always be 12 volt on the relay contact terminals at all times. One of the contact terminal comes from the start fuse and the other goes to starter motor solenoid coils. What about the other two coil terminals on the relay base with the relay removed? One is ground and the other is driven from ECU 'STA' terminal via the neutral start switch. The engine ECU drives the starter relay in the fuse panel. Have you unplugged the neutral start switch from the tranny? This will isolate the ECU wiring from the rest of the circuit. The circuit for the starter relay was ECU - neutral start switch - starter relay. And all the interconnecting wiring (and junctions) in between.

Sorry I don't have the wiring diagram handy in front of me for another week or so. I don't remember anything other devices in the starter circuit. It was quick simple when looking at it the other night.

[Mike-4103 Junior Member Find all posts View Profile Close Mike-4103]

Thanks mate

It now seems to be fine the gremlin has left the car

Has me a bit worried however what caused the issue however