brake lights work, and all other lights and electrical work perfect.
my next option is pulling the entire dash and doing a complete re-wire, i was gonna do it last week but i didnt have time

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"Marilyn" 64 Dart GT & "Stella" 64 Valiant V100 Sedan - 63 Norton Project

What are the wire colors and sizes that connect to it? Perhaps I can find it by working through the color coded wires in the FSM.

CJ

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Part of Tyrde-Browne Racing

thanks ceej but i have the same fsm that you do and i cannot find any mention of this part in it. also the haynes dosent have anything either. i have been trying to find info on this all day because of this post. and i really want turn siginals.

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"Marilyn" 64 Dart GT & "Stella" 64 Valiant V100 Sedan - 63 Norton Project

Dan,
Now that I think about it,my daughters car does sometime fail to start in park,when that happens,I gently nudge the column shifter towrds park a little and it starts fine,when I nudge the shifter,thats when I here the click.
When it fails to start in park ,it will start in neutral regardless.
HyperValiant

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1960 Hyper-Pac Valiant(rolling test-bed)
1963 Valiant V2OO(Son's summer project,- he just turned 15 )
1972 Valiant 4dr(Daughter Kelly's repair in progress)
1974 Valiant (v8) daughter Kelly's work in progress

HyperValiant same here, but only once in a great while. but mine doent click. netural saftey switch maybe?

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"Marilyn" 64 Dart GT & "Stella" 64 Valiant V100 Sedan - 63 Norton Project

Having to nudge the shifter to get it to start is classic neutral safety switch behavior. It could only need adjustment.

Do you have the wiring diagram?
http://www.mymopar.com/downloads/1973/73DartA.jpg
http://www.mymopar.com/downloads/1973/73DartB.jpg

It looks like you have a combination neutral safety/reverse light switch. And, this switch is connected to to the turn signal flasher. If you have intermittent no-start and turn signal problems, I think I’d look at the
neutral safety switch next...

Danny

Correct, such a combination switch — having three pins and screwed into the side of the automatic transmission — was used from 1969 through the end of RWD Mopar production. And yes, having to jiggle the shift lever in Park (or shift to Neutral) to get the engine to crank is indeed a symptom of a misadjusted or faulty neutral safety switch and/or shift linkage.
Mmm...where are you seeing that? I've never found an interconnection between the neutral safety/reverse switch and the turn signal flasher, either on a vehicle or on a wiring diagram.

MiDi: Why such reluctance to state how many and what colour wires are connected to the mystery device...?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

On the above posted wiring diagram. Maybe I went cross-eyed for a second tracing the wires but it looks like the black wire on the turn signal flasher goes to the neutral safety switch. Dudnit?

i have no reluctance to state whats hooked to it , i'll take a look @ it when i finish my breakfast. it was dark last night and i was drunk.

also my flasher has one wire running to this part .... coudl this be causing my turn siginal problem? i also still don't have back up lights .........

hmm sounds like i need to replace this mystery part

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"Marilyn" 64 Dart GT & "Stella" 64 Valiant V100 Sedan - 63 Norton Project

OK, the combination switch was crossing me up. There's no interconnect between the turn signals and the neutral safety switch, but there is between the turn signals and the reverse lamp switch. I'm seeing the same thing you are, but I think there's something the matter with this diagram. Trace that black wire as it leaves the input side of the T/S flasher (ignition-on 12v feed), goes through cavity "W" of the multi-way connector, goes to one pole of the reverse lamp switch, then keep tracing through the reverse lamp switch: Another black wire which according to this diagram goes to cavity "C" of the engine side of the multi-way connector...and stops there! Note there's nothing connected to cavity "C" on the dashboard side of the connector. ??!! :shrug: What's this wire for and where does it go after it hits cavity "C"?

Also take note of the mystery rectangular box just before we reach the reverse lamp switch. Not labelled, so we don't know what it is. That third black wire, which connects to the RH terminal on this mystery rectangular box, goes to cavity "Z" of the firewall disconnect. On the other side of cavity "Z" is a white wire which goes through cavity "6" of a midbody disconnect to send power via two violet wires to the left and right reverse lights. OK, that's easy enough. But then what's the purpose of the wire running from the reverse light switch to cavity "C"?!! Only guess I can come up with is that some late '60s - early '70s cars with manual transmissions had a "REVERSE" indicator light on the dash that lit up when the car was in Reverse gear. I didn't think they used those on A-bodies, but I could be wrong there.

No turn signals and no reverse lamps makes sense in that both of these systems share a common feed. Probably no power to this feed, which suggests a missing or misrouted wire.

MIDI: I don't think this mystery part, if wired properly, would cause your turn signals and reverse lights not to work. Once I know some wire colours, I'll see if I can figure out where it fits into the circuit and maybe provide some more helpful info.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

well i went to my local MOPAR parts dealership ( timberline dodge )

i talked to 2 of there very helpfull staff with the mystery part in hand.
after them pulling a ton of cool mopar books and even looking up stuff on micofishe they say mystery part is #3620858 part of the seat bealt interlock and it is discontunied.

here is a picture of the wiring i am color blind infact almost completly in low light. so you guys can see what colors it is.


i also went to the following wherehouses in portland: napa, autozone and csk. they all couldn't figure out what it was.

i have it removed right now and my car starts fine and i have everything working other than turn siginal and brake lights

also if the netural saftey is the thing on the trans with 3 connectors i have replaced it.

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"Marilyn" 64 Dart GT & "Stella" 64 Valiant V100 Sedan - 63 Norton Project

It's definitely discontinued, but it is not part of a seatbelt interlock system your car never had. P/N 3620 858 is indeed a "seat belt system" relay (parts code 8-37-70, "Relays"). It is listed likewise in the 1972 FPC, and in the 1970-71 FPC, and again, the interlock was a '74-production only item, so at last the mystery is solved: this relay controls the fasten-belts reminder light and buzzer. You may safely remove and discard it; it has nothing to do with whether the car runs or whether anything but the light and buzzer work.
A yellow, a brown, a grey, and a dark blue with white tracer.
Yep, that is the combination Neutral Safety and reverse light switch. It's pretty clear you're not getting power to the feed that supplies the reverse lights and the turn signal circuit. What kinds of electrical diagnosis tools do you have? Multimeter...? Test light...?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

2 multi meters and a test light. where do i look?

thanks dan!

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"Marilyn" 64 Dart GT & "Stella" 64 Valiant V100 Sedan - 63 Norton Project

First you look in the factory service manual. The free wiring diagrams online are very good for general reference, but the ones in the FSM are considerably more detailed and will make this job much easier. Basically you start at the points that don't have power, and trace the wire that's meant to feed those points back along its path, checking for +12v with the ignition switch on at every connector and accessible junction until you find power. The fault lies between the last place you didn't find power and the first place you did.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

i have the fsm cd rom and a ton of diff wiring digarams and so on.
i have since i got the car trying to trace the problem, with no luck. today i tryed again and still nothing. i have a backround in electronics and also took electronics in college and i am baffled.

my brother's shop couldn't figure it out and same with a few board members that have tryed to help me. i just better get an after market turn siginal kit and replace mine or get use to hand siginals

cheers!

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"Marilyn" 64 Dart GT & "Stella" 64 Valiant V100 Sedan - 63 Norton Project