negative into positive

Suby Roo · Post by **Suby Roo** » Tue Jan 08, 2008 10:04 pm

Whilst installing a car alarm/immobiliser/remote starter into my car i encountered a problem with the remote starter.

a wire needs to be connected to a negative which turns to a positive once the car is started which lets the computer controlling the system know that the car is started so it stops throwing the starter motor in. (if this makes any sense)

Tried connecting it to the alternator and to the coil but neither works.

Any suggestions??

Jarrod

vincentvega · Post by **vincentvega** » Tue Jan 08, 2008 10:27 pm

usually they have a pickup on one of the spark plug leads that senses ignition pulses to know the car is running.

you sure it just wants a positive to say the car is running?

Suby Roo · Post by **Suby Roo** » Tue Jan 08, 2008 10:30 pm

well going off what it says in the manual is that it needs to recieve a 12v dc charge. so im assuming that it only needs a positive.
Ill write exactly what it says in the manual tomorrow.

And another one of my friends has one and the same wire had to be wrapped around the coil lead. tried this but it doesnt work either.

steptoe · Post by **steptoe** » Wed Jan 09, 2008 9:24 am

a negative that changes to positive once engine is running ?? If it was nothing to then positive I was thinking a vacuum switch like on gas conversion lock offs but the will switch on during cranking

SuBaRiNo · Post by **SuBaRiNo** » Wed Jan 09, 2008 12:13 pm

Maybe the alternator light circuit. Thats a negative which alows the light on the dash to light up and goes to a positive when the car is running. Im not fimilar with remote start though...just know it's highly illegal.

Surely the manual makes some suggestions. Is it a single page manual... something you can scan and post so we can take a gander.

Dave

Chris_Rogers · Post by **Chris_Rogers** » Wed Jan 09, 2008 9:02 pm

send me a scan of the diagram of this thing. most of them are TACH based OR oil light, who made the alarm?

steptoe · Post by **steptoe** » Wed Jan 09, 2008 9:14 pm

I was thinking oil light this arvo, but who wants an engine riding on the starter just coz the oil pressure ain't up yet !!

Chris_Rogers · Post by **Chris_Rogers** » Wed Jan 09, 2008 9:18 pm

on most of the korean/cheap chinese ones (IE jaycar) thats what tehy want that wire connected to. most cars will get full oil pressure JUST after startup. perfect timing for the starter to drop out. the more expensive ones (DEI-viper et al ) drive off the TACH or by time intervals. prefer tach items myself that way the thing shuts down and doesn't grind the starter (usually..)

littlewhiteute · Post by **littlewhiteute** » Wed Jan 09, 2008 9:20 pm

Alternator warning lamp wire, as said above, did it ten years ago with my own remote start system.
Started perfectly everytime, no excess starter run time, cannot re-engage starter remotely. Cost me next to nothing to
make.

Oil pressure has too many variables, cold or hot, oil viscosity, engine wear.

Suby Roo · Post by **Suby Roo** » Wed Jan 09, 2008 10:38 pm

Thanks for the help guys. I havent got a scanner so i cant scan it in but ill try using the alternator warning lamp wire.

It is a cheap brand one, Thor. The manual doesnt make much sense because its been translated to english from some other language but hasnt been properly put.

D3V1L · Post by **D3V1L** » Wed Jan 09, 2008 10:48 pm

alternator warning light is what i hooked up mine to about 3 months ago...been working ever since

dave

Suby Roo · Post by **Suby Roo** » Tue Jan 15, 2008 9:37 pm

thanks for the help guys. i hooked it up to the warning light as suggested and it works beautifully.