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starter motor wiring puzzle
mk85 - 11/1/15 at 12:53 AM

Am trying to find info on wiring my starter up. I have a Nissan engine with an ecu. I have purchased my ignition switch and have one of the terminals labeled for the starter. Now on the starter motor I have the main power lead and one small cable. I presume the small goes to the ignition switch and power direct to the batter as it has the terminal on the end of the cable.

Is there any idiots guide to this side of it.

thanks people

coozer - 11/1/15 at 09:56 AM

Sounds like you have bit sussed. Connect the big fat wire to the battery and the small one to the switch, turn the key and see what happens.

rusty nuts - 11/1/15 at 11:29 AM

As already suggested but it might be worth fitting a relay to take any heavy loads off of the switch

snowy2 - 13/1/15 at 11:25 AM

The starter solenoid is a relay.....it should not need a relay to opperate it......modern cars that show relays in the cct are almost start inhibit relays used with immobiliser systems.

mk85 - 13/1/15 at 11:44 AM

quote:
Originally posted by snowy2
The starter solenoid is a relay.....it should not need a relay to opperate it......modern cars that show relays in the cct are almost start inhibit relays used with immobiliser systems.


thanks

adithorp - 13/1/15 at 12:19 PM

quote:
Originally posted by snowy2
The starter solenoid is a relay.....it should not need a relay to opperate it......modern cars that show relays in the cct are almost start inhibit relays used with immobiliser systems.


Starter soleniod has quite a big draw. Technically you could call it a relay but it's a fecking big one. Triggering it with a relay reduces the current through the ignition switch and will reduce the chance if burnt terminals. Whether that outweighs the extra complexity... ?

big_wasa - 13/1/15 at 01:45 PM

Not counting the initial spike the solenoid draws around 10A.

rusty nuts - 13/1/15 at 07:42 PM

Burnt out ignition switches are fairly common due to the initial heavy current drawn by the solenoid.