Print Page - tach on MC9

Title: tach on MC9
Post by: jhaggerty on September 15, 2007, 03:45:55 PM

Hi Folks,

The tachometer on my MC9 has never worked since I bought the bus last year. I would like to get it working. The connections at the alternator seem to be alright. Is there someplace I should check for volts, current, continuity or something. The Tach does not light up or make any movement at all. Thanks,

Jim

Title: Re: tach on MC9
Post by: JackConrad on September 15, 2007, 03:58:18 PM

If your tach is like mine, it ha 4 wires (terminals) on the back of the tach. one from the R terminal on the alternator, one is ground, one is the light inside the tach and the other is the power supply (12 or 24 volt) switched by the master switch. What brand is the tach? Jack

Title: Re: tach on MC9
Post by: jhaggerty on September 16, 2007, 05:23:43 AM

Hello Jack,

It is a Sun tach. I have the wiring digram from MCI, I just don't know what I should be testing.

Thanks, Jim

Title: Re: tach on MC9
Post by: jhaggerty on September 25, 2007, 05:51:02 AM

I have just checked the back of the tach. It has three wires. One is the illumination and there are a white and a black, each going to a terminal on the back. There is also a black wire that is not hooked up and is taped over the end. The tachometer seems to be grounded through the case. Any ideas how to test this unit?

Jim

Title: Re: tach on MC9
Post by: Dallas on September 25, 2007, 06:22:04 AM

Jim,
You may find some help from the manufacturer.

Here:

http://www.sunpro.com/user_manuals.php (http://www.sunpro.com/user_manuals.php)

BCM Community

Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: jhaggerty on September 15, 2007, 03:45:55 PM