Location of tach wire through firewall

[challenger_73]

Does anyone have a picture of where the tach wire comes throught the firewall and the grommet that is used for it?
challenger_73

[FY1Cuda]

On a '70 the tach wire goes through the bulkhead connector (spot #20). Just looked at a '73 wiring diagram... Same thing.
http://www.mymopar.com/downloads/1973/73ChallengerA.JPG

[dodj]

On a '70 the tach wire goes through the bulkhead connector (spot #20). Just looked at a '73 wiring diagram... Same thing.
http://www.mymopar.com/downloads/1973/73ChallengerA.JPG

Not on a Challenger. Separate wire with it's own hole and grommet.
Sorry OP, don't know exactly where it is supposed to go. I just drilled a hole where I wanted to put it.

[challenger_73]

Thanks guys!  I  think that is what i will do.  Thanks for the help.
challenger_73

[Grec]

Hold on, bud.

There's a specific place for it. (there's a dimple where the hole goes.)

[Grec]

Actually... now that I think about it, I may have tach wire and clutch safety switch mixed up in my firewall-hole-drilling recollection...

The factory tach wire setup plugs into the firewall bulkhead... and then connects to the neg on coil. Gray w/black stripe wire.

There's different ones depending on BB or SB... (length of lead)

http://www.classicindustries.com/product/1970/mopar/parts/me8112.html

[roadman5312]

    Firewall.   

[roadman5312]

reverse light has it's own hole, tach wire in bulkhead.

[Chryco Psycho]

  but the position may change n different years

[YellowThumper]

Checked and it is located in the bulkhead.


I will try and look on my 74 tonight and report back what I have.
If not tonight tomorrow then.

Mike

[lulurocks]

My tach Grey wire w black tracer  went thru firewall in its own grommet  like the service manual shows .

Mines a 73 rallye 340 auto car.  I traced it in the harness the best i could and it went to the grommet .

I could be wrong 

My glorious hand model pic shows where the wire came thru , see below

[dodj]

My tach Grey wire w black tracer  went thru firewall in its own grommet  like the service manual shows .

'73 is a separate wire with it's own grommet. Any other year, I have no comment. 

[YellowThumper]

'73 is a separate wire with it's own grommet. Any other year, I have no comment. 

Well my 74 ain't got dat hole...

[challenger_73]

Uh oh! Too late! I already drilled the holes. I drilled them in the right place and installed the grommets already. You really can't see them to well anyway as they are behind the brake booster. Thanks for your help everyone.
challenger_73