Seat belt interlock 1974

[runner74]

Sorry if this has been beat to death already, but does anyone have pics of how you bypassed the Seat belt interlock on your 74? Did you keep the original wires connected to the override button and just connected the two yellow wires with suit case connectors or completely remove from the button/box. I saw a video that shows a heating element inside the box with contacts etc. Want to do it right the first time. The video link below. Very interesting.

https://www.youtube.com/watch?v=3xXtmlSHtIQ

 

[WP29440SE]

yep , just connect the two yellow wires.

 

[mopar 3 B]

It it not illegal in your state to ride in or drive a vechile with out wearing seat belt that was required to have them from the factory?

 

[WP29440SE]

It it not illegal in your state to ride in or drive a vechile with out wearing seat belt that was required to have them from the factory?

all that does is interrupt the power to the starter if the seatbelt is not fastened. it was a safety feature not a standard

 

[440roadrunner]

It it not illegal in your state to ride in or drive a vechile with out wearing seat belt that was required to have them from the factory?

Wearing or the not wearing of belts has nothing at all to do with the ill fated interlock. In fact it is a safety issue. You could well end up with a non-running vehicle at a crucial time. The issue is that the interlock cut off being able to drive the car.

As said above, there are two "yellowish" wires going to the reset device. These are the "start" wire which comes from the key on the way to the start relay. Simply permanently connect them.

http://www.forabodiesonly.com/mopar/showthread.php?t=14304

http://i304.photobucket.com/albums/nn166/CraigBurk/1974 Duster/IMG263.jpg

 

[mopar 3 B]

We would just fasten the seat belt at the dealership then they would start up with no one in the seat. Saved get in and out of the car to start it.

 

[Bruzilla]

I'm surprised to hear there's still a car with one of these still functional in it. Every one that I've seen was disconnected decades ago.

What's also odd was one of my 1973 Roadrunners that I had also was equipped with this setup. I had always thought it was a 74 only item but this one had it.

 

[Nacho-RT74]

I'm surprised to hear there's still a car with one of these still functional in it. Every one that I've seen was disconnected decades ago.

originally Mopars assemblied in Venezuela never got this interlock system BUT since I'm "cloning" my Venezuelan Charger to a NorthAmerican 74 Charger, I got all the system from there and is in working order. In fact got a NOS blue interlock box and a Canadian orange box too ( which is not really interlocked ), actually is with the Canadian unit ( non interlocked ) to make work all the buzzing and warning signals system, but I tested the blue box and everything works correctly with it

 

[dodge1972]

Remove connections below the seats. Both driver and passinger seat. This will allow starting without connecting belts. 1974 only year with this requirement

 

[Bruzilla]

Remove connections below the seats. Both driver and passinger seat. This will allow starting without connecting belts. 1974 only year with this requirement

I had it installed on a 1973 Roadrunner.

 

[ODZKing]

From another fellow on third gen forum
View attachment 282552

 

[Nacho-RT74]

I had it installed on a 1973 Roadrunner.

not interlock system, just warning lights and buzzer system relay controled, not control box like 74s.

this is what 73 uses ( and 72 ).

this is what 74s uses ( for auto cars... manual are white, non interlocked boxes are orange and green on laters )

Both located on same area, close to glovebox, underdash


Beside that, 72/73s got the seatbelt sensor on retractor. 74s got it on female buckle

 

[Bruzilla]

I had the exact same setup on that one 73 as I have on my 74, right down to the bypass switch on the firewall. I didn't know what it was back then and asked the folks at Ray Mixon Chrysler Plymouth about it and they told me it was the interlock and they also said it shouldn't be on a 73.

The VIN was RM21G3A298803.

 

[ODZKing]

I had the exact same setup on that one 73 as I have on my 74, right down to the bypass switch on the firewall. I didn't know what it was back then and asked the folks at Ray Mixon Chrysler Plymouth about it and they told me it was the interlock and they also said it shouldn't be on a 73.

The VIN was RM21G3A298803.

It shouldn't. That is interesting, was it a very late production? June, July?

 

[Bruzilla]

I'm assuming it was, but I don't know how to translate production number into placement on the line. I'm guessing 298,803 was pretty late in the year.

 

[ODZKing]

I'm assuming it was, but I don't know how to translate production number into placement on the line. I'm guessing 298,803 was pretty late in the year.

Several ways, fender tag, door vin tag or build sheet. Have those?

 

[Nacho-RT74]

Talking about date production, dunno if this helps ( taken from a april 74 catalog ):

Check the item 8-37-145



Maybe some VERY lates 73 could get it ? dunno.

 

[Bruzilla]

Several ways, fender tag, door vin tag or build sheet. Have those?

Nope. That car was junked back in 1991 or so. All I have left is the title.

 

[ODZKing]

Well, the number is deceiving. If they ONLY built 73 Charger's at the plant where yours was built you could get a fair estimate.
That car was the 198803rd Vehicle Built at the plant yours was produced at. Coronets, Satellites ... maybe they did others I don't know. According to my notes they built 119,318 - 73 Chargers, the biggest production year of all Chargers. So it was clearly a late(er) production but to say when is tough.
One of the 3 previously mentioned would be the only real way to get an accurate date.
Body Type: R = Road Runner
Price Class: M = Medium
Body Type: 21 = 2 Door Coupe
Engine: G = 318 150HP(net) or 170HP(net) 1-2BBL 8 CYL
Year: 3 = 1973
Sequence Number: 298803 = 198803rd Vehicle Built