Remote Start Engine

I have installed a remote start engine

t starts normally but after few second the starter runs again.

the alarm needs a negative ground (-) when the car starts so the starter will never start when the car is running.

I have a 1989 Mercedes-Benz 300E.

all i need is where to connect the wire (Negative ground when started)

By the way, my alarm has a second option:

i can wrap the same wire around the high tension cable of distributor.

Thanks for your help.

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The Peace Maker

What brand alarm is it??

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"ole blake"

I dont know what is the brand of the alarm i think its "TOP VENOM ALARM"

i just want to know where to connect the wire

what gives the negative ground when the car start (or positive , i can put a relay)

thanks for your help

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The Peace Maker

The (-) while running is used as an output, not an input. If it's actually an input then it's probably a very old remote-starter. Ages ago we used to hook them up to a vacuum switch, which would explain why your starter keeps cranking, even after it is running.

Does the remote starter have a tachomoter (pulsed) input?

If not I suggest you purchase a remote-starter that was made after the 80's which has a tachometer input (pulsed). You can try hooking up a vacuum switch, but they can be a real pain to adjust.

If so, forget about that wire and use the tach wire instead.

It probably is an input but made in Hong Kong or Taiwan or something. The negative input when running is probably a tach wire that got lost in translation. Usually they are referring to hooking the wire to the negative side of the ignition coil. Put up a scan of the wiring diagram if you still aren't sure. We can probably help you decipher it.

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Steve G

If it really is some old system that needs a ground input to tell it to stop cranking, you might try adding a voltage comparator with the threshold set to something like 13.2V or so. When the car runs up and the alternator starts putting out, the voltage will rise above the threshold and the comparator circuit can ground that line as necessary.
During normal starting, the voltage is below the threshold so the RS is enabled to crank.
It's a bit easier to do than put together a tach monitoring circuit. Easier still may be to get an updated RS as mentioned-

From the description that you can wrap the wire around the spark plug wire, it sounds like it does have a tach monitoring circuit, so you probably need to hook up to a tach line.
If it really is some old system that needs a ground input to tell it to stop cranking, you might try adding a voltage comparator with the threshold set to something like 13.2V or so. When the car runs up and the alternator starts putting out, the voltage will rise above the threshold and the comparator circuit can ground that line as necessary.
During normal starting, the voltage is below the threshold so the RS is enabled to crank.
It's a bit easier to do than put together a tach monitoring circuit.

Remind me not to try editing by hitting the back button...