Hooking up a tach

[Snoopy-2]

Replaced the tach which was not working and rehooked all wire correctly and it is still not receiving and pulse signal. The pulse wire is grey and I loose it in the harness trace. Some one told me that some times the wire goes into the shifter assembly before reaching the tach. I opened up shifter assembly and did not see any grey wire. (see attached photos) If I can not locate the wire in the harness what is my next choice of options. Can I run a new wire directly from the tach to (where ?). Also what is this white square 2 wired unit in the shifter assembly for?

 

[Snoopy-2]

Re: Hooking up a tach

View attachment 225244

View attachment 225245

Replaced the tach which was not working and rehooked all wire correctly and it is still not receiving and pulse signal. The pulse wire is grey and I loose it in the harness trace. Some one told me that some times the wire goes into the shifter assembly before reaching the tach. I opened up shifter assembly and did not see any grey wire. (see attached photos) If I can not locate the wire in the harness what is my next choice of options. Can I run a new wire directly from the tach to (where ?). Also what is this white square 2 wired unit in the shifter assembly for?

added 2 more pics




its on a 1988 whaler with a 98 johnson 115

 

[175se]

Re: Hooking up a tach

that white square thing looks to be the warning horn . I would find the main harness (big black harness comes from motor) before ign. switch and look for grey wire your problem could be there. I believe it was boobie that gave a site for wiring diagrams for different boats in another post.

 

[Snoopy-2]

Re: Hooking up a tach

175se--Thanks found what I needed all OK now. Works fine. Thanks again.

 

[Will Bark]

Re: Hooking up a tach

What did you find and where?

 

[Snoopy-2]

Re: Hooking up a tach

Went back and double checked my wire hook and found out I had connected a ground wire to the pulse wire. I kick myself for not double checking- When I installed the new tach it was getting dark and I miss read the wire colors --that was all it was. Point to myself DOUBLE-CHECK every time. I could have done some thing worse. I forgot my number one quote-If you can't find the time to do it right the first time then where will you find the time to do it over?