73 charger sweeping gauges to ralley gauges

[texas charger 73]

I recently acquired a Ralley gauge cluster for my 73 charger. I currently have the ugly standard one. What all I need to convert to the Ralley gauge.  I have heard something about oil pressure.  Is it a pretty easy swap?

[ODZKing]

I have hear the wiring is the same unless you have a clock or teach and even then it is just an added harness.
What you WILL have to do however is change the sender for the oil pressure and the temperature. And if you have a light there, the connector will have to be modified.
If you go to my site I have the wiring schematics on there.
http://www.retrorarities.com//images/73-74ChargerSchematics.pdf

[texas charger 73]

So do I need to change the senders on the motor or the harness?,just downloaded your wiring diagram

[ODZKing]

So do I need to change the senders on the motor or the harness?,just downloaded your wiring diagram

Yes, what you have is an open.close sender and you need a varible that will work with the gauge.
Temp is 2426458 crosses to NAPA Part Number: MPE TS6178SB
Oil Pressure 3488609 NAPA Part Number: MPE OP6603SB

[texas charger 73]

Thanks a ton.  I downloaded the wiring diagram and wow.  Looks like rocket science

[Nacho-RT74]

temp sender should be the same... doesn't?

oil sender as stated

if you could get a 72/73 underdash wiring harness would be allmost a plug and play job

Consider the wiper switch ( if the cluster didn't came with it ) since is diff from the standard cluster. Headlight switch is the same

knobs are diff too.. BOTH... ( if it didn't came with cluster )

[ODZKing]

temp sender should be the same... doesn't?

I am not familiar with the non-rallye gauges. 
IF the temp is not an idiot light, then yes Nacho, the sender would be the same.
The idiot light sender is # 2857562.  The gauge sender 2426458.

[texas charger 73]

OK here is a few more questions. Today I received my Ralley gauge and wiring harness.  I didn't know that the wiring was all the wiring under the dash. I thought that the gauges were a stand alone harness from the fuse panel and stuff.  My first question is can in use the standard gauge harness already there and just change the connectors and lengthen wires as needed, should intry to rebuild the Ralley harness or should I buy a new harness and where can I find a new harness.  Last question for now.  His can I determine what car this came out of? He had it just laying around in parts and he not sure where it came from,but it was given to me so so far I have no $$ invested. It won't let me upload pics on here,bit I can gladly email pics if it would help me figure this out. Thank you guys so much.

[Nacho-RT74]

both standard and rallye clusters got temp gauge, not idio light... just oil changes.

ok, texas...

everything will depend on your skills abut follow diagrams, solding wires etc...

Standard harness can be used to patch the rallye harness if needed.

Standard gauges can be converted into Rallye harness too.

how to identify the harness.. lets see... if the harness you got, it gets this device attached ( orange, white, blue... ) or the plugs without the box... its a 74



If the harness you got, it gets the 3 pins conector to driver side door jam switch, and wiper conection is two separated plugs instead one piece, is 71

If the harness you got it gets the seatbelt plug ( pair of blue wires  ) to driver side kick panel, is 72/73. Beside that, if got a female source to hideaways on light green wire running to floor dimmer switch, is 72, if not, is 73

[Nacho-RT74]

ANYTHING can be done, will depend on how perfect you want the job, your skills, harnesses condition etc...

[texas charger 73]

I got tons of pics but keeps telling me to large. I'll have to email them I guess. Anyways see no orange plug. I believe its probably 71 cause it only has 9 fuses. Attached to fuse box is something else that looks like a big plug. It looks as if it has 2 melted terminals in the plug.  I think it might be easier to just find a 73 good harness or try to mate this to my standard fuse box..  Man electrical can be tough. Being that I'm injured and stuck at home in a wheel chair I'll have plenty of time to try to rewire it all.  I just have to find a good diagram I can read for the wiring.  Never read one before. Just looks like a jumbled mess if lines. Nacho thanks for always helping me and you to Bob. You guys are on top of your game. 

[Nacho-RT74]

plug is white... just the box is orange white or blue... that's the interloick control box, just part of the car on 74 and 75s

wiring:

Don't need to deal with fuse box... you can splice the cluster section of Rallye harness to the multipin conector of your original harness, matching the colors. All colored the same for same functions, and the colors match the same between rallye and standard cluster.

These are on MULTIPIN:
One of the Blues-gas gauge ( negative source as all senders are  )
Gray-Oil gauge
Violet-Temp gauge
Orange-cluster lighting
One of the Blacks- Ground to cluster
One of the Blues-Run circuit ( this is keyed positive in RUN )
One of the blacks-Ground to brake light
Tan-one directional pilot lamp
Light green-the other directional pilot lamp

Those are the ones I recall right now LOL

Then maybe consider couple of wires more around and done.

Probably will need to elongate the wiper switch pigtail too.

becarefull with the ground which feeds the voltage limiter ( larger female spade terminal ). Rallye cluster gets two black wires, one is positive the other one is negative. Thats because the Ralley cluster originally it's sourced from ACCESORIES source which is black wiring.

Standard cluster gets the gauge source ( voltage limiter ) from RUN circuit, blue wire. On Ralley cluster the blue wire is just designed to light up the brake light. You can either feed up the gauges from RUN ( blue ) or from ACC circuit as you wish. BUT this black positive source is not provided on standard cluster, so on a "plug and play" job, will need to source the voltage limiter from blue circuit on multipin... or run an extra wire from fuse box acc side... as you wish. Diagrams shows which fuse is the one used

That's pretty much everything

[texas charger 73]

Nacho can I email you some pics?,there is a couple things I wanna ask what a few pieces on harness are?

[Nacho-RT74]

yea right, my email is on my profile

[Nacho-RT74]

forgot one wire:
Red-high beams indicator

[texas charger 73]

I sent you email earlier nacho

[Nacho-RT74]

replied

[ODZKing]

This isn't a bad price
http://www.forbbodiesonly.com/moparforum/showthread.php?67087-Complete-1973-Charger-Wiring-Harness

[Nacho-RT74]

Actually IMHO... with those damages, that's not cheap.

[Nacho-RT74]

mmm, just noticed its a FULL car harnesses... that changes everything. Still needs a fix on ign switch plug on underdash harness... it seems the ammeter wires were somehow modified? dunno