986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - CPU Wiring Help Needed

tholyoak · 09-11-2007, 11:03 AM

On Porsche's the tach signal (TN signal) is always purple with a black stripe. You can pick it up at the cluster or at the DME. On your 2000 I believe it is the white plug pin 15 on the cluster and on the DME it should be plug IV #17. You can pick the vehicle speed up at the cluster as well (white plug #16, wht/brn wire). It comes from the ABS computer via the abs sensors wire. It can also be picked up at the DME via the wht/brn wire on plug IV #22.
The speedometer A signal is for things like the speed dependent volume on the radio.

Todd

09-11-2007, 11:03 AM	#4
tholyoak Registered User Join Date: Jan 2006 Location: Glen Allen, ON Posts: 314	On Porsche's the tach signal (TN signal) is always purple with a black stripe. You can pick it up at the cluster or at the DME. On your 2000 I believe it is the white plug pin 15 on the cluster and on the DME it should be plug IV #17. You can pick the vehicle speed up at the cluster as well (white plug #16, wht/brn wire). It comes from the ABS computer via the abs sensors wire. It can also be picked up at the DME via the wht/brn wire on plug IV #22. The speedometer A signal is for things like the speed dependent volume on the radio. Todd __________________ Current Cars: 1989 911 Targa 1984 944 Original Owner 1971 911T