Old thuderheart schematics...

fantomaz

Member
Quick question:

On a 2004 with the old, dual fire thunderheart module, what color wire is the pulse (trigger)?

Thanks in advance...
 

bdmridgeback

Low Down Chop Shop
Yellow!

Green goes into the EHC as pin position #20 to signal the tach ring yellow wire from the tach ring going into the EHC as pin position #21.

Yellow wire runs in a separate harness and runs direct to the coil and not through the EHC.
 
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