Remote Solenoid question...

[MattG]

Putting an LS3 in my '69 Camaro and even thought I think I understand how to relocate the battery to the trunk, I have one last question.

If I run the starter trigger wire to the remote solenoid in the trunk, what triggers the solenoid at the starter? Do I split the wire and run it to both the starter and the solenoid in the rear?

I think I'm missing something obvious, or just over thinking!



Thanks guys,

Matt

[rocketrod]

...If I run the starter trigger wire to the remote solenoid in the trunk, what triggers the solenoid at the starter? Do I split the wire and run it to both the starter and the solenoid in the rear?
...

Assuming you are running a stock starter you bypass the solenoid on the starter by building a jumper that connects the solenoid to the battery terminal of the starter. I build my jumper out of 16 gauge sheet metal. If you have an aftermarket starter read the manufacturer's recommendation on how to do this.

Look at these instructions/schematics for additional details, http://www.madelectrical.com/catalog/tm-1.shtml

[MattG]

Perfect, thanks. I knew there was a better way!

[amargari]

That only works if the starter is not a permanent magnet starter. Here is a quote from the PowerMaster web site.

Also, you can see their instruction sheet here:
http://www.powermastermotorsports.com/027___IS_PMGR.pdf

See question #7 here: FAQ-Starter
which says:
Why does my starter seem to "run on" after the switch is released?

This is a common complaint on Ford permanent magnet starters, although it can occur on any permanent magnet starter in the right conditions. This situation develops when the ignition terminal on the starter is "jumpered" to the battery terminal on the starter and a remote solenoid is used. Permanent magnet starters can actually produce power if they are driven from an outside source (i.e. the starter will act like an alternator once the engine fires and starts spinning). The current produced in the starter for this second or so will flow from the starter's battery terminal to the starters ignition terminal and hold the solenoid in. This will cause the one to two second delay in the solenoid release and an irritating noise. The solution is to wire the starter per the instruction sheet, which will ensure that the ignition switch terminal goes dead the instance the key is released.

Not sure if the newer GM starters are a permanent magnet design.

[MattG]

Good info..

It must not be an issue with the stock starters, cause I haven't heard anyone complain about any issues with the remote solenoid setup. I have a stock starter, so I'll give the jumper a shot and see how it goes!

Thanks guys.

[67rally]

Just make sure you run the jumper to the S terminal (closest to the engine block) on the starter. I had mine hooked to the R terminal by accident (couldn't see the S terminal with the headers in the way) and spent a couple hours trying to trouble shoot. This isn't my pic, but shows how it's jumped:

[MattG]

That only works if the starter is not a permanent magnet starter. Here is a quote from the PowerMaster web site.

Also, you can see their instruction sheet here:
http://www.powermastermotorsports.com/027___IS_PMGR.pdf



Not sure if the newer GM starters are a permanent magnet design.

I just spoke with Mark at MAD Electric and he confirmed that you should not jumper a modern permanent magnet starter (ls3 as and example). You can do it with old style starters though.

Mark includes a relay with his remote starter kit. You use the start trigger wire to power the solenoid in the start circuit and the relay is wired into that to run up to the starter solenoid. I bought his kit and he includes the diagram to show how it works.

Mark really knows his stuff and I look forward to insalling his kit!

[chuckd71]

Yeah, no jumper on newer starters. The relay kit mentioned above works well, though you could piece the same thing together cheaper. Buying the "kit" such as it is is pretty nice however since you know you have everything you need and you get the instructions.

[diesel25lrs]

Could someone please tell or show me what i would need for just the relay instead of a jumper? How its wired & to where... I have new LS3 with trunk mount battery & was planning on jumper bar until i found this thread...
Thanks

[rocketrod]

Could someone please tell or show me what i would need for just the relay instead of a jumper? How its wired & to where... I have new LS3 with trunk mount battery & was planning on jumper bar until i found this thread...
Thanks

The following is instruction are assuming you have a remote solenoid mounted in the trunk.

You will need one SPDT relay, use 14 gauge wire for all relay connections and mount the relay toward the front of the car (I am mounting mine on the passenger side under the dash).

• Relay pin 85 to chassis ground
• Relay pin 86 splice into the wire running to the S terminal of the remote solenoid mounted in the trunk.
• Relay pin 87 to the S terminal of the solenoid on the starter.
• Relay pin 30 to the to the battery cable on the starter.

What happens is when you turn the key to the start position, the new relay is energized (pin 86). At the same time the remote solenoid is activated sending voltage to the starter and pin 30 of the new relay, which flows through pin 87 to the S terminal of the starter solenoid to allow it to crank. As soon as the key returns to the run position the power to the S terminal of remote solenoid and pin 87 of the new relay is removed and there is no voltage flowing through the large cable connected to the starter.

[dmracing1982]

The following is instruction are assuming you have a remote solenoid mounted in the trunk.

You will need one SPDT relay, use 14 gauge wire for all relay connections and mount the relay toward the front of the car (I am mounting mine on the passenger side under the dash).

• Relay pin 85 to chassis ground
• Relay pin 86 splice into the wire running to the S terminal of the remote solenoid mounted in the trunk.
• Relay pin 87 to the S terminal of the solenoid on the starter.
• Relay pin 30 to the to the battery cable on the starter.

What happens is when you turn the key to the start position, the new relay is energized (pin 86). At the same time the remote solenoid is activated sending voltage to the starter and pin 30 of the new relay, which flows through pin 87 to the S terminal of the starter solenoid to allow it to crank. As soon as the key returns to the run position the power to the S terminal of remote solenoid and pin 87 of the new relay is removed and there is no voltage flowing through the large cable connected to the starter.

I know this is an older thread, but I have a push button for the starter. How would I wire a starter push button into the relay.

[diesel25lrs]

Rod,
You are awesome! thanks much :-)
The wire you speak of splicing into on pin 86 goes to the S terminal on ford solenoid- where is it coming from- ignition wire?

Thanks,
Josh

[rocketrod]

Rod,
You are awesome! thanks much :-)
The wire you speak of splicing into on pin 86 goes to the S terminal on ford solenoid- where is it coming from- ignition wire?

Thanks,
Josh

The wire goes from the S terminal on ford solenoid (remote solenoid) to the start wire (purple wire) which ties into your ignition switch and neutral safety switch circuit (for automatic cars).

[diesel25lrs]

Thanks again! Hooking it up tomorrow- your timing is perfect! ;-)

[rocketrod]

Thanks again! Hooking it up tomorrow- your timing is perfect! ;-)

Glad I could help.

[dmracing1982]

One more question, Where would you put the battery disconnect switch at? Before or after the remotely mounted solenoid?