| jesse |
Posted
Friday, Jun 29th 8:25pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 353
SF, USA
Dinan 1978 333i, honda insight, audi S4 |
Hey guys,
Long time no chat. I feel like I asked this on here before but....
Does anyone know what the harness looks like for the instrument panel and where the easiest place to T off of the tach signal might be?
I could use the signal going to the tach, or I guess I could somehow get it after the tach as well.
Cheers,
Jesse |
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| M42powered |
Posted
Friday, Jun 29th 8:51pm [Edit] [Quote] [IMS] [View car] |
Staff
Post nr. 722
Arizona, USA
1981 BMW 320i |
Jesse...
It's a green with black stripe wire if memory serves. Easiest place to tap into it is at the fuse box. The fuel pump requires a tach signal to keep running once the car is running on the alternator.
The connector on the passenger side of the fuse box has that signal in it. I used it both for my MSD-BTM on the M10 and I had to find it for the M42 swap. |
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| jesse |
Posted
Friday, Jun 29th 8:57pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 354
SF, USA
Dinan 1978 333i, honda insight, audi S4 |
Thx Nic,
So it sounds like it should have at least one end terminating at the fuel pump? Or is it part of the fuel pump relay bundle? (which I have been dealing with quite a bit as part of the mass air flow conversion anyway)
Jesse
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| jbob |
Posted
Wednesday, Jul 4th 5:11am [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 386
AZ, USA
81 320i |
yeah, it should be in the fuel pump relay harness plug.
On my '81 320i, the tach signal is a black wire...and it's all interconnected between: the ignition coil, ignition control unit, speed relay (for k-jet's open/closed loop), fuel pump relay, diagnostic connector, & tach. |
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