Quick help on Tach wire for MSD6a

Skyman · 06-20-2001, 08:02 PM

Im hooking up a Mallory window switch, and it needs to hook up to the tach wire on my after market ignition.. I have a MSD6a thats been hooked up for years now. What wire do I hook it up to?

Thanks

Sky

------------------
-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
50-175 Nitrous Works WET Kit just added.

84_GT350 · 06-20-2001, 11:41 PM

Well...if you've hooked in the tach wire to the MSD box, it should be easy. The tach wire will be coming out of the tach port on the box. If not, here's what I did when I needed to get my tach working again after the ignition control module was gone (which I know isn't your problem...but I found the tach wire). I cut into the heat shielding that was on the wires to the ignition control module. Then, look for the tach sending wire (mine was green with a yellow tracer on it). Cut that out of the harness and hook it up to your window switch. This worked for my car, but I have an '84. It had the Duraspark II system, but it didn't have TFI. My guess is they're probably the same though. Good luck.

------------------
1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s

Jeff Chambers · 06-21-2001, 06:30 AM

The tach wire port is on the left end of the 6AL, all by itself. There's a male spade connector built into the casing that the tach lead attaches to. Same end of the housing as the crank trigger wires/connector that usually doesn't get used.

------------------
Jeff Chambers
Trophy Stock #3
11.611 Seconds / 116.98 MPH
Chambers Racing Team

Skyman · 06-21-2001, 01:45 PM

I found it thanks.

Sky

------------------
-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
50-175 Nitrous Works WET Kit just added.

06-20-2001, 08:02 PM	#1
Skyman I need 110mph Trap Speed! Join Date: Feb 1999 Location: So, CA Posts: 4,315	Quick help on Tach wire for MSD6a Im hooking up a Mallory window switch, and it needs to hook up to the tach wire on my after market ignition.. I have a MSD6a thats been hooked up for years now. What wire do I hook it up to? Thanks Sky ------------------ -1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows. 12.55@107mph 50-175 Nitrous Works WET Kit just added.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to wire in a auto meter tach	1badmystic	Modular Madness	1	04-11-2003 03:09 PM
again, How to cure code 66 (maf below minimum voltage) ????	HAITHAM	Windsor Power	6	11-12-2001 09:10 AM
Need some on wire palcement for 5" tach with shift ligh.....	Coolbreeze	Windsor Power	3	10-07-2001 06:51 PM
how to wire a tach to the coil????	Super_Stang	Windsor Power	1	08-18-2001 08:08 PM
Need some tach help QUICK!	84_GT350	Windsor Power	1	06-09-2001 02:58 AM

06-20-2001, 11:41 PM	#2
84_GT350 Registered Member Join Date: Apr 1999 Location: Overland Park, KS, USA Posts: 1,631	Well...if you've hooked in the tach wire to the MSD box, it should be easy. The tach wire will be coming out of the tach port on the box. If not, here's what I did when I needed to get my tach working again after the ignition control module was gone (which I know isn't your problem...but I found the tach wire). I cut into the heat shielding that was on the wires to the ignition control module. Then, look for the tach sending wire (mine was green with a yellow tracer on it). Cut that out of the harness and hook it up to your window switch. This worked for my car, but I have an '84. It had the Duraspark II system, but it didn't have TFI. My guess is they're probably the same though. Good luck. ------------------ 1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s

06-21-2001, 06:30 AM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	The tach wire port is on the left end of the 6AL, all by itself. There's a male spade connector built into the casing that the tach lead attaches to. Same end of the housing as the crank trigger wires/connector that usually doesn't get used. ------------------ Jeff Chambers Trophy Stock #3 11.611 Seconds / 116.98 MPH Chambers Racing Team

06-21-2001, 01:45 PM	#4
Skyman I need 110mph Trap Speed! Join Date: Feb 1999 Location: So, CA Posts: 4,315	I found it thanks. Sky ------------------ -1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows. 12.55@107mph 50-175 Nitrous Works WET Kit just added.