 All tached out, need wiring help,please |
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| porschetub |
 Apr 8 2020, 11:56 PM
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Advanced Member  Group: Members Posts: 4,699 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None  |
Changing from a 911 641 301 00 (early 70's ) tach to a 911 641 301 86 (911 SC MY 86),the early tach has a different rear plug but both share a 3 wire connection.
Bowlsby (thanks Jeff ) pic shows wire 11 as being red/white as 12V supply ,wire 13 as being earth (ground) brown x 2, wire 12 black /purple I presume is signal from CDI box via relay board ?.  Late tach is #2 to 4 across the top and #5 to 8 across the bottom ,#2,6 and 7 are the only used, help please as me and VDO instruments have never been happy together (IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/lol-2.gif) .TIA. |
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Posts in this topic
porschetub All tached out Apr 8 2020, 11:56 PM
GregAmy Not quite sure what you're asking...but if you... Apr 9 2020, 06:29 AM Mark Henry Do you have MSD? Notorious for a poor tach signal ... Apr 9 2020, 06:55 AM porschetub Thanks Greg and Mark and yes I should have been a ... Apr 9 2020, 02:39 PM IronHillRestorations I'm only seeing three connections on the tach ... Apr 9 2020, 03:33 PM porschetub Thanks Perry,what I'am thinking also after fur... Apr 9 2020, 10:41 PM
Mark Henry Quick test is to shove a 4 cyl tach in there, swit... Apr 10 2020, 07:42 AM porschetub
Quick test is to shove a 4 cyl tach in there, swi... Apr 10 2020, 01:18 PM  |
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