Short intro to long story - central locking fob on key died on our X reg Bongo, so thought Id fit alarm/immobiliser/central locking control with fobs to resolve...have spent 11 hours trying to wire in a well(ish) know brand of unit that has a normally closed relay inline with the stater solenoid feed from the ignition switch, 87a & 30 are the starter feed switching/interup, 85 is a switched earth thru the alarm/immobiliser unit & 86 is a +ve feed.
I have the option in the destruction manual to take the feed for 86a from the ACC circuit switched feed (called low power mode) that only provides power to the relay when the ignition switch is turned to ACC or wire it via a permanent feed.
I thought I'd chose the ACC fed option - then the fun begins....relay tested & functions fine NC, Open when power applied, take relay out of circiut starter wont work, turn key to ACC relay clicks etc - all going to plan...turn key to poss 3 & starter turns/engine starts regardless of the apparent state of the relay, have earthed it independently as well to test & no change
After contemplating taking a very large hammer to everything in sight, I ve just had a thought...when the ignition switch is turned to poss 3 to start, doesnt this kill the ACC circuit to give the starter motor full battery power
If so surely this kills the feed to the relay & it goes NC - so effectively no functionality - am I clutching at straws or does this theory have some validity...if its good I think just need to power terminal 86 with a permanent un -switched feed
Please help so some faith in my DIY skills can be restored
