Hooking up a remote Tach.

[james750]

Ive been trying to hook up a remote tach to check my idle with the guage cluster to see if I set the pot correctly. I know that the red lead goes to the ignition coil negative and the black lead goes to ground. BUT, which wire is the negative to the coil? There are 3 spaces for connectors on the bottom of the coil and 2 of those spaces have connectors plugged in (The space closest to the rear of the truck is open). Which wire should I hook up to?

[Eagle]

If this is for your '90, you have a pair of yellow diagnostic connector ports under the hood, near the relay bank on the passenger side. One of those is a feed for the tachometer. I posted a pin-out for both connectors awhile back.

[james750]

Thanks Eagle, I used search and found your post. I hooked it up and got the answers I needed. Unfortunately I need to pull the cluster and adjust the pot.

[Eagle]

I'm glad you found it. I went searching for it last night and search wasn't giving me anything at all.

[Pete M]

Could you paste a link here for future searchers? :thumbsup:

[james750]

http://comancheclub.com/forums/search.php?keywords=Diagnostic&terms=any&author=Eagle&fid[]=2&sc=1&sf=all&sk=t&sd=d&sr=posts&st=0&ch=300&t=0&submit=Search

 

3rd post down. :thumbsup:

 

(the [] brackets in the link are throwing of the URL code, but they are a part of the address, so I can't hyperlink it, sorry).

[Eagle]

See if this link works. Once we knew the date, I found the thread the hard way, so the URL doesn't include all the search parameters. The diagram (such as it is) is on the second page of the thread, toward the end.

 

viewtopic.php?f=2&t=14777&start=15