Starter Interlock?
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Starter Interlock?
Hi, my first post.
A friend gave me a rather rough '76 F-100. The engine has been swapped, a 302 for a 289. The truck has an automatic trans. It cranked without problems before I removed the steering column to free up the frozen shift mechanism. Now it will not crank when I turn the key to start. It will crank if I jump the starter solenoid. It seems there is no continuity from the switch to the solenoid. Is there an interlock switch? If so where would I find it.
Thanks
A friend gave me a rather rough '76 F-100. The engine has been swapped, a 302 for a 289. The truck has an automatic trans. It cranked without problems before I removed the steering column to free up the frozen shift mechanism. Now it will not crank when I turn the key to start. It will crank if I jump the starter solenoid. It seems there is no continuity from the switch to the solenoid. Is there an interlock switch? If so where would I find it.
Thanks
Laughing Gas
Joined: Sep 2006
Posts: 791
Likes: 62
From: Backwoods of western Pa
There is no interlock switch that I am aware of, the only wires that go into the column are for the turn signals/4-ways, the horn, instrument light for the shifter, and cruise control if so equipped. I would suggest checking the wires at the ignition switch to make sure that you didn't bump something loose when removing/installing the column, if that's good, get a buddy and test the solenoid activation wire with your buddy holding the key to Start. If you have juice there at the solenoid, replace the solenoid. Solenoid failure is common on these old Fords.
More Turbo
Joined: Apr 2004
Posts: 736
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From: South East, Michigan
I think the NSS may be located on the bottom of the steering column, make sure it was plugged back in after column installation. It may just need to be adjusted also. Try to move the gear selector to neutral or another gear (BE SURE TO BLOCK THE WHEELS AND APPLY THE BRAKE WHEN YOU DO THIS!!!) and see if it will crank, if so you need to adjust the NSS. -Ed
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Welcome to the site Airman 
For standard transmissions the NSS is on the trans
For automatics the NSS is on the column until 1978 when it moved to the side of the trans.
He didn't say what trans he had.
I suspect the NSS or its wiring as well .
If it's an Auto trans. Try going back and forth between Park & Neutral to see if you can get it to turn over..It may just need adjusting.
If it's a standard check out the condition of the switch as it's down there with all the grease and grime and may need cleaning.'
For standard transmissions the NSS is on the trans
For automatics the NSS is on the column until 1978 when it moved to the side of the trans.
He didn't say what trans he had.
I suspect the NSS or its wiring as well .
If it's an Auto trans. Try going back and forth between Park & Neutral to see if you can get it to turn over..It may just need adjusting.
If it's a standard check out the condition of the switch as it's down there with all the grease and grime and may need cleaning.'
More Turbo
Joined: Apr 2004
Posts: 736
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From: South East, Michigan
Originally Posted by Mil1ion
He didn't say what trans he had.
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Hey guys,
Thanks for all the replies. I'm glad I found this forum!
The NSS is located on the column. This one had all the wires ripped off, not even a recognizable wire connection left so I didn't think it was a switch until I looked more closely. I found the wires that were "disconnected" and spliced them together to get the truck to start. I know it will start in any gear now but that doesn't matter until I can get a gear to engage (another problem). The trans is a 3 speed automatic and it seems like the parking pin is engaged and the internal linkage is broken. It will not shift out of park. Any thoughts on this?
By the way I will need a new switch, and what is the gauge pin hole for?
Thanks
Thanks for all the replies. I'm glad I found this forum!
The NSS is located on the column. This one had all the wires ripped off, not even a recognizable wire connection left so I didn't think it was a switch until I looked more closely. I found the wires that were "disconnected" and spliced them together to get the truck to start. I know it will start in any gear now but that doesn't matter until I can get a gear to engage (another problem). The trans is a 3 speed automatic and it seems like the parking pin is engaged and the internal linkage is broken. It will not shift out of park. Any thoughts on this?
By the way I will need a new switch, and what is the gauge pin hole for?
Thanks
New User
Joined: Jan 2008
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The gauge pin hole is for making the adjustment for the Neutral position.
The way it works is.
Loosen the linkage......place transmission in neutral...place gearshift in neutral...
Loosen NSS on column
Rotate the NSS until you can place a the drill bit right into the hole aligning up everything.....Now....Tighten everything back up..remove drill bit and the engine should start in neutral or park.
The way it works is.
Loosen the linkage......place transmission in neutral...place gearshift in neutral...
Loosen NSS on column
Rotate the NSS until you can place a the drill bit right into the hole aligning up everything.....Now....Tighten everything back up..remove drill bit and the engine should start in neutral or park.
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