JCB-69CJ 11 Report post Posted March 1, 2010 I am currently running an aftermarket tach on my cj because I was unable to get the factory tach to work with my msd 6al ignition setup. At this point I am assuming its just a wiring issue that is causing it not to work. Is anyone running the factory tach via their msd 6al unit and can give me the wiring details? Is there additional hardware I need to get it working? Thanks in advance. I really want to get that factory tach working. Quote Share this post Link to post Share on other sites
mcgirr455 10 Report post Posted March 1, 2010 I have a factory tach and have a tach adapter between it and tha msd box. Quote Share this post Link to post Share on other sites
Fordrevhead 29 Report post Posted March 1, 2010 you need this, but if you already tried without it, it is possible that you fried your tach. http://www.msdpowersports.com/pdf/frm22049_pn8920.pdf Quote Share this post Link to post Share on other sites
JCB-69CJ 11 Report post Posted March 1, 2010 Thanks for the info. I will get that part. Hopefully the tach is still usable. I don't know if the PO tried to hook it up. If its n/g I will have it rebuilt. Thanks again. Quote Share this post Link to post Share on other sites
