Safety Switch with an B&M shifter on a TF727 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 11-17-2002, 12:31 PM Thread Starter
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Safety Switch with an B&M shifter on a TF727

Anyone hooked a safety switch up on a aftermarket shifter setup. After hooking the linkage up reversed the first time I think I can see the benefits of having an automatic that will only start in park (I have TBI so it shouldn't die alot and have to be restarted on the trai). The switch is still on the tranny but I don't have a clue as to how to wire it to interupt the ignition. A diagram or simple explanation would be great.
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post #2 of (permalink) Old 11-17-2002, 12:48 PM
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Re: Safety Switch with an B&M shifter on a TF727

The safety switches I have installed on B&M shifters usually go on the shifter gate itself. They are usually just a micro-switch that the circuit becomes closed when the micro-switch is pushed in by the action of the shifters arm. The micro-switch goes in the ignition wire, when the shifter is in Park or Nuetral the switch closes allowing 12v to go thru allowing you to start, when in any other gear the circuit is open, not allowing current to pass. From what I remeber, B&M has different ones for the different shifter models, or you can pull the cover and you will probably see where the switches usually go.
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post #3 of (permalink) Old 11-17-2002, 05:18 PM
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Re: Safety Switch with an B&M shifter on a TF727

Have a little "pucker factor" incident? [img]images/graemlins/laugh.gif[/img]
When we were putting the final stages on Mossy, I "accidently" bumped the starter while in gear and of course, it fired up. Dang near pushed the brake pedal thru the floor trying to make it stop! It scared me pretty good [img]images/graemlins/blush.gif[/img]. Not half as bad as the surge forward (3 times!) while filling the tranny initially. Probably because I was layed up over the engine, feet dangling, and there was a tractor parked right in front. I kept envisioning my self squashed like bug against the 3point. [img]images/graemlins/grin.gif[/img]

When are you gonna post some pics???
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post #4 of (permalink) Old 11-17-2002, 07:27 PM
 
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Re: Safety Switch with an B&M shifter on a TF727

How many wires are on the switch? If you have a ohm meter just find the 2 terminals that close when in P or N and run your start wire through those 2 terminals. If it has other terminals they are for backup lights.
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post #5 of (permalink) Old 11-17-2002, 11:01 PM
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Re: Safety Switch with an B&M shifter on a TF727

on any tourqueflight transmission the center terminal on the nuetral safety switch on the transmission goes to ground whenever the trans is in park or nuetral. this is usually hooked to the starter relay so that the vehicle only starts in these gears. the outside two terminals are a switch that connects the terminals only in reverse for reverse lights.
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