Welcome Visitor! Please take a few seconds and mcstein
New Member
- Joined
- Jan 5, 2011
- Messages
- 17
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 84
- Make / Model
- ford
- Transmission
- Manual
88 ranger 2.9l 5sp
I just fixed a no spark problem by replacing the wire that goes from the tfi-iv module to the coil. It was the dark green/yellow. I did a lazy mans fix and just strung the new wire around the cabin instead of through the bundle of wires.
As a result the truck starts and runs but I lost my tach. I'm reading conflicting articles that the tach was either wired to the coil or to the computer. I believe mine is supposed to be wired to the computer. my haynes onky shows 1 green/yellow wire going to my coil from tfi. It also shows a wire going from yhe eca to inst cluster.
So why would cutting out that green/yellow wire lose the tach. Is there supposed to be another wire that splices into the tfi to coil wire for the tach to get signal from? I was figuring my tach got its signal from thr computer(eca).
Here's a copy of the haynes diagram im using. I copy and pasted from the internet.
I just fixed a no spark problem by replacing the wire that goes from the tfi-iv module to the coil. It was the dark green/yellow. I did a lazy mans fix and just strung the new wire around the cabin instead of through the bundle of wires.
As a result the truck starts and runs but I lost my tach. I'm reading conflicting articles that the tach was either wired to the coil or to the computer. I believe mine is supposed to be wired to the computer. my haynes onky shows 1 green/yellow wire going to my coil from tfi. It also shows a wire going from yhe eca to inst cluster.
So why would cutting out that green/yellow wire lose the tach. Is there supposed to be another wire that splices into the tfi to coil wire for the tach to get signal from? I was figuring my tach got its signal from thr computer(eca).
Here's a copy of the haynes diagram im using. I copy and pasted from the internet.
