VS only cranks when bridging starter relay

[VSEXEC]

Hey all,
Just finished wiring up the track car, now i have no key and VATS is removed and have wired a switch for acc and ignition and an engine start button. When i turn acc and ignition on that all works but when i go to press start nothing happens. I then bridged pins 87 & 30 of the starter relay and it cranked. Any thoughts to why this is. Thanks

 

[Immortality]

Where is the power source coming from for the engine start button?

 

[axemurderer101]

check if you are getting a power and earth on pins 85 and 86.
also is your car auto or manual? if the harness you used was from a auto you may need to bridge the park neutral switch wiring.

 

[VSEXEC]

Power is coming from ignition wire and starter wire for the button.
Ill check for power on the other pins in the morning. It was auto is now manual and just put in a manual body loom the other week.

 

[Nut Kracker]

May be some help.
http://forums.justcommodores.com.au...s/209356-monaro-not-starting-technical-4.html

 

[wamboin23]

did you wire the inhibitor switch wiring to earth?

it gets its earth through the BCM, so if that has been removed you will have no earth circuit to the starter relay.

 

[VSEXEC]

The bcms still in it i earthed pin 86 and got the button to light up but no crank

 

[aussie4life]

why not power the push button straight from the battery? worst it will do is cank but not fire? it should be as simple as wiring power from battery to button. then from other side of button to trigger pin of the relay. as long as the ignition is on it should fire. and if not, then it will crank over but just not actually start.

 

[wamboin23]

Well you need to check if you are getting the positive crank feed from the switch to the relay.
If you are then make sure you've got the earth there.

One of those will be your problem, if not it will be the relay.
Sent from my RM-825_apac_australia_new_zealand_259 using Board Express

 

[VSEXEC]

I think ive got it working now i just joined constant ignition and start wire together with pin 86 earthed and it cranks so ill play with the start button tomorrow. Thanks to all for the help