Re: Engine wiring Reply #25 – February 16, 2017, 09:11:21 am Thanks, the project is slowly moving ahead. I put shore power on the coach yesterday, and that system is working. Inverter appears to be OK. Just needs more dollars, parts and the most difficult, time. Quote Selected
Re: Engine wiring Reply #26 – February 16, 2017, 09:30:04 am Quote from: Racedad – February 15, 2017, 09:10:51 pmDoes anyone have the following schematics?B-2126A-4752Note that there can be a difference in these drawings depending on model year. Probably nothing significant from late 90's to early 2000's, but B-2126 for 2003 is different than the one Don posted (note the CN - his drawing applies starting with coach 5409 so will likely is different that that for coaches with earlier build numbers). Quote Selected
Re: Engine wiring Reply #27 – February 16, 2017, 10:56:42 am Very interesting Michelle! I failed to notice that... the dates on the drawing are 3/27/92 and 6/22/98. Our coach was built in July of 98' as a 1999 model, and the build number is 5402. The drawing came with our coach docs and does seem to correspond with what I have found, though given the high degree of individuality I have seen in coaches of the same model and vintage, I don't take it for granted that all the details are correct.DonQuote from: Michelle – February 16, 2017, 09:30:04 amNote that there can be a difference in these drawings depending on model year. Probably nothing significant from late 90's to early 2000's, but B-2126 for 2003 is different than the one Don posted (note the CN - his drawing applies starting with coach 5409 so will likely is different that that for coaches with earlier build numbers). Quote Selected
Re: Engine wiring Reply #28 – February 16, 2017, 11:06:46 am The drawing provided by Don appears to be correct for my build. Quote Selected
Re: Engine wiring Reply #29 – February 22, 2017, 12:20:01 pm I have removed all of the damaged wiring and have started on the new engine harness. Does anyone know what the OEM part numbers are for the dash air high and low pressure switches? Quote Selected
Re: Engine wiring Reply #30 – February 22, 2017, 03:18:54 pm Standard R134a open on high pressure and open on low pressure. Take them out to find replacements. Under each is a valve core (like tire stems) that close when switch is removed to prevent refrigerant leak. Quote Selected
Re: Engine wiring Reply #31 – February 22, 2017, 03:27:10 pm Unfortunately the part numbers were on the plastic that melted. Thanks for the information. Wayne Quote Selected
Re: Engine wiring Reply #32 – March 22, 2017, 03:35:04 pm Almost ready to start the engine, but need to know where the water temperature and high temp senders are on the engine. Oil pressure sender appears to be coach passenger side mid block, with two look alike senders forward and aft from there. Without removing and heating them they are a mistery. Help! Quote Selected
Re: Engine wiring Reply #33 – March 22, 2017, 04:32:23 pm The water coolant sensor on our ISC 350 is above the starter at a pipe tee pretty much level with head top in case yours is same.JohnH Quote Selected
Re: Engine wiring Reply #34 – March 22, 2017, 04:46:52 pm John, thanks for the info. My coach was a custom order with mechanical 8.3 and all of the sender's are mounted directly into the block on the side opposite the starter. Factory wiring diagrams label the Foretravel wiring but none of the I'd numbers for Cummins or Allison supplied wiring. I will resort to trial and error. Quote Selected
Re: Engine wiring Reply #35 – March 22, 2017, 07:00:35 pm Without engine running, but ignition on, momentarily ground sender wire to see gauge needle movement. Quote Selected
Re: Engine wiring Reply #36 – March 22, 2017, 07:19:26 pm The temperature sender for the gage on my C8.3 is mid block on the driver side below the exhaust manifold. I don't know where the other senders are. Quote Selected
Re: Engine wiring Reply #37 – March 22, 2017, 08:34:54 pm Unscrew the sender's enough that some fluid starts running out, Barry's idea to ground it if you have a helper should give a slight movement. Quote Selected
Re: Engine wiring Reply #38 – March 22, 2017, 09:02:42 pm I know which wires go to each gauge, but not which sender is a high temp switch, and which is the gauge sender. I think I now have them identified. The high temp switch should be open when cold as is the temperature gauge sender. The temperature sender appears to have a minimal resistance. The problem with the oil pressure sender appears to be that it was damaged when shorted, and now has no resistance. Will try to identify the part number and replace it tomorrow. Thanks again for the suggestions. Quote Selected 1 Likes
Re: Engine wiring Reply #39 – March 22, 2017, 11:13:04 pm Good catch, high temp sender and any other safety sender is most likely either open or closed. I would think the oil pressure would be a industry wide sender to interface industry wide gauges. But could be wrong. Kinda like a 10k ohm world wide universal temp sensor. Quote Selected
Re: Engine wiring Reply #40 – March 30, 2017, 12:02:17 am Does anyone have drawing numbers A-4845 and A-6190. Almost ready to drive the coach. Still have some electrical issues but slowly finding them. Engine runs! AC electrical finished. Will try to get some help tomorrow so I can determine what breakers still have shorts. Takes someone to turn the key while I am in the cargo bay. Quote Selected
Topic: Engine wiring