Tach signal question

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Tach signal question

02-09-2022, 06:50 AM

Fatmerc89

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Join Date: Feb 2022

Location: Brisbane

Posts: 11

Tach signal question

I’m soon starting an EFI and turbo conversion in my 89 300se. I’ll be using a haltech ecu soo will be wanting to remove any of the old harness that controls the engine. Which wire from the ignition module provides tach signal to the fuel pump, instrument cluster and Klima relay? I want the tach and a/c to still be functional. Has anyone got the wiring diagram for the engine harness?

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