727 neutral safety switch???
03-18-2008, 08:21 AM
#1
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727 neutral safety switch???
Hello, I was wondering if anyone could help
with a neutral safety switch problem.
1. 68 Barracuda original colunm shift w/ 727 tranny.
2. MY neutral safety did not work when I got the car but already had a floor shifter in it.
3. Just got a B&M mega shifter and now trying to figure out how to get switch to work.
4. I replaced the screw in switch(neutral safety switch) on the tranny it has three pronges. I got a wire harness to hook up too it
But have been told you need no wiring because its
internal??? but a old chiltons book says neutral safety is the middle pronge so I run wire to connector switch on shifter.
still starts in every gear??? unhook wiring still starts every gear??? So its not internal I guess??? How do I wire this up where it will not start in gear???
PLEASE HELP
with a neutral safety switch problem.
1. 68 Barracuda original colunm shift w/ 727 tranny.
2. MY neutral safety did not work when I got the car but already had a floor shifter in it.
3. Just got a B&M mega shifter and now trying to figure out how to get switch to work.
4. I replaced the screw in switch(neutral safety switch) on the tranny it has three pronges. I got a wire harness to hook up too it
But have been told you need no wiring because its
internal??? but a old chiltons book says neutral safety is the middle pronge so I run wire to connector switch on shifter.
still starts in every gear??? unhook wiring still starts every gear??? So its not internal I guess??? How do I wire this up where it will not start in gear???
PLEASE HELP
03-18-2008, 10:24 AM
#2
How your neutral safety switch works:
Start with the firewall starter relay. The older stick shift cars had only one "pull off" connector on the firewall relay, which went to the "start" postition on the key. When you twist the key, the switch feeds battery to this terminal and engages the starter relay.
The auto's add a SECOND "pull off" terminal on the starter relay. This wire goes to the neutral safety switch, which GROUNDS this wire WHEN IN neutral or park. Therefore, if you unhook the neutral safety switch, the car should not start.
The other two prongs on the neutral safety switch operate the backup lights.
If your car starts without the switch hooked up, either someone has grounded the wire, or it is shorted, or someone has replaced the relay with a "stick" shift relay.
Here's a picture of an "auto" relay. Also, starting in '70, stick shift cars had a clutch pedal switch so that you had to push down the clutch to operate the starter, so '70 and later 'stick cars used the same relay as the auto cars
Start with the firewall starter relay. The older stick shift cars had only one "pull off" connector on the firewall relay, which went to the "start" postition on the key. When you twist the key, the switch feeds battery to this terminal and engages the starter relay.
The auto's add a SECOND "pull off" terminal on the starter relay. This wire goes to the neutral safety switch, which GROUNDS this wire WHEN IN neutral or park. Therefore, if you unhook the neutral safety switch, the car should not start.
The other two prongs on the neutral safety switch operate the backup lights.
If your car starts without the switch hooked up, either someone has grounded the wire, or it is shorted, or someone has replaced the relay with a "stick" shift relay.
Here's a picture of an "auto" relay. Also, starting in '70, stick shift cars had a clutch pedal switch so that you had to push down the clutch to operate the starter, so '70 and later 'stick cars used the same relay as the auto cars
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