102c3 Dash Switch Wiring - Page 3
 

102c3 Dash Switch Wiring

Started by Jcparmley, August 08, 2018, 07:05:54 PM

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jraynor

Quote from: Jcparmley on August 15, 2018, 10:47:46 AM
The last 5 of my vin is 42724.  I will look for the Dual Vanner when I get out to the bus.  Thank you so very much for your help.

Jared

While you are at it, See if you have a 12v main disconnect switch as well. The drawing closest to your coach shows a 12v and 24v
Jonathan
1986 TMC 102A3 6V92TA Currently Under Reno

Jcparmley

Would that be located near the main switch in the battery box?  I just sent you a pm with my email.  That might be easier to communicate.

Quote from: jraynor on August 15, 2018, 12:51:53 PM
While you are at it, See if you have a 12v main disconnect switch as well. The drawing closest to your coach shows a 12v and 24v
1989 MCI 102c3 6v92TA Mechanical

Jcparmley

I only have one main disconnect switch.  Here are some pics of my front panel and the battery switch.





















Quote from: jraynor on August 15, 2018, 12:51:53 PM
While you are at it, See if you have a 12v main disconnect switch as well. The drawing closest to your coach shows a 12v and 24v
1989 MCI 102c3 6v92TA Mechanical

Jcparmley

Hi Jraynor

I am working on this problem again.  I have just been starting the bus from a switch I installed at the starter when I put a new starter in last fall.  Anyhow, I do have power at main disconnect, the vanner, and the 12v and 24 v buss bar.  However, I have no power to the dash, the master switch, or the rear engine start control panel.


Quote from: jraynor on August 15, 2018, 04:12:15 AM
ok so you have an older model 102C3 then. They seemed to have changed from a 65 stud to 100 stud at some point.

I was partially misleading you as well. The 81 is from the bus bar not a stud, But Im unable to locate your 12v bus bar. Use this method:

1. Turn on your 12v and 24v battery disconnect.
2. Walk over and open your front junction box. Measure 12 volts at the front junction box 12v bus bar, just measure the voltage found on each bus bar until you find 12 (Decals that show where everything is in Group A either drawing A-B2 or A-B3)
?If no voltage, the follow cable BL to your 12V main disconnect switch. If no power at the 12v Main disconnect, follow it to Vanner #1. If no power there, follow it to your middle battery tap. If no voltage there, then the issue is the battery.
?If you do get 12v, go to 3

3. Measure 24v from your front junction box 24v bus bar, just measure the voltage found on each bus bar until you find 24V. There may be multiple 24v bus bars
?If no voltage, follow cable BK to your 24v battery bus bar in your A/C junction box. the 105Amp stud should read 24v. If no voltage, follow cable BK-1/0 (its size) to 24v main disconnect. If no voltage from there, follow the 4/0 wire to the battery. If no voltage, Its the batteries not providing 24v.
?If you do get 24v, got to step 4

4. Standing from the outside of the drivers side window, with the electrical box open, Turn on the master switch by reaching through the window. Do you hear a contact block close?

Report back with the results and if you reach step 4 successfully

Ive attached a photo showing what the bus bars should look like, youll also see my main power cable as well. I would image that you should be able to get to step 4 above unless your batteries are your issue.
1989 MCI 102c3 6v92TA Mechanical

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