Tach/ignition issues HELP!

greatlaker

Recruit
Joined
Aug 24, 2010
Messages
4
Hi,

Background on my boat: 1997 Chris Craft Ultra 21 with a volvo 5.7 GSi. I recently refinished my dash panels and put all the gauges back. I did each gauge individually and was extremely careful about the wiring order/connections. The gauges are Faria and original to the boat, and were working perfectly before. When the key is turned, my tach needle floats counter-clockwise to the 6000 spot and only bounces a little with the engine running no matter what RPM. Also, and I have no idea why, but with the key off and out of the ignition, tuning my navigation lights on activates everything the same as if I put the key in and turned the ignition to the "on" position. If I unplug the tach from the main harness, everything but the tach functions correctly and there are no issues with turning the nav lights on or off. If the engine is running and the nav lights are on with the tach plugged in, taking out the key does nothing...it will not kill the engine until I turn the nav lights off. I was very careful to make sure everything was re-assembled correctly and have been over everything several times. I have no idea what is going on, but it seems to be something related to the lighting system or a bad tach??? For now I just have the tach unplugged and everything runs and works fine. Thanks!!! Rob
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Tach/ignition issues HELP!

You have the tach ignition terminal attached to the nav lights somehow. Maybe the ground terminal as well.
 

greatlaker

Recruit
Joined
Aug 24, 2010
Messages
4
Re: Tach/ignition issues HELP!

Ahhhh!!! My fault...I connected the ground wire to the wrong post on the trim gauge! Everything seems to work as normal, but I think I fried the tach. Thankfully everything else is o.k. When I turn the key on it rotates counter-clockwise to about 3000, and with the engine on runs in reverse. And I made sure everything was correct...yeah triple checked it this time. I am hoping once I get the boat back on the water it will re calibrate with higher RPMs. not quite sure, but I guess it means a new tach if it doesnt work.
 
Top