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K. Wiggins
K. Wiggins, ASE Certified Technician
Category: Mercury
Satisfied Customers: 2992
Experience:  ASE Certified Technician, Associates Degree in Automotive Technology, 15+ years in the trade
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I need to hook up my MSD 8918 tac adapter, tac signal GMR,

Customer Question

I need to hook up my MSD 8918 tac adapter, tac signal GMR, magnetic Trigger style, each to get the tac to work. I have put the green wire on all the coil packs and it won't work.
The install instructions show grm pick up being connected to coil harness center wire marked coil [+]. There are a thousand wires of all colors coming off the powertrain control module. ??? which one?
Submitted: 1 year ago.
Category: Mercury
Expert:  K. Wiggins replied 1 year ago.

The + wire (red) on any of the coil packs should work according to msd. Are you putting the pickup on the wires properly as well as having switched power and ground as in figure 2 here as well as having it set for single cylinder operation

Customer: replied 1 year ago.

Thank you it"s done.

Expert:  K. Wiggins replied 1 year ago.

Glad to hear you got it going. Thanks for using Just Answer!