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01-17-2020, 07:50 AM
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#1
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Senior Member
Fleetwood Owners Club Spartan Chassis
Join Date: Oct 2019
Posts: 478
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No Power/Short To LP Detector
The original CCI LP detector sat dead in its location near the floor in the galley. It was well past replacement so I ordered a new one. When I unplugged the original (3 wire pigtail connection) and checked for voltage I got nada. I assumed an open circuit but could not locate. Finally found the fuses under the stairs and discovered they were blown. I replaced the fuses and they blew immediately -- with no detector plugged into the circuit. I had replaced the coach batteries prior to moving on to the LP detector and thought I had been meticulous about replicating all the connections -- attaching a red lead to one of the positive terminals. I've not touched the chassis batteries. I understand that I'll need to reconfigure from a 4 wire to 2 wire connection but my problem is that the fuses blow (both to the coach and chassis batteries) without a detector installed. Any thoughts or help in how to troubleshoot this? It is an older coach with the original absorbtion fridge so I'm leery about not having a functioning detector.
__________________
2004 American Eagle, 40L
Cummins 400 ISL, Spartan Chassis
2009 Honda Fit Sport
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01-17-2020, 09:13 AM
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#2
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Senior Member
Join Date: Nov 2018
Location: Beaver Dam, Wisconsin
Posts: 5,038
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It is unlikely the change in coach batteries is involved in the blown fuses issue. It you hooked up one or more batteries wrong, nothing powered by the coach batteries would work.
You said "fuses" were blown and blow again when you replace them.
How may fuses blow and
what are the sizes of the blown fuses?
I expect each fuse protects one circuit. If multiple fuses blow I expect one cause.
A loose ground wire falling across more then one terminal could cause both to blow a fuse.
A broken or deteriorated insulator in the fuse block could ground more than one circuit.
A nail or screw driven into a set of wires could ground more than one circuit.
Cross wiring ground and positives together can blow multiple fuses.
Did you say you are combining 4 wires into two wires. Maybe that is the cause.
Many possible causes exist.
__________________
Paul Bristol
Kodiak Cub 176RD
Nissan Pathfinder 2015
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01-17-2020, 09:36 AM
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#3
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Senior Member
Fleetwood Owners Club Spartan Chassis
Join Date: Oct 2019
Posts: 478
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Thanks, Paul. The detector circuit is independently wired to both battery sets -- a line to the house and line to the chassis as a safety precaution. There is a 3 amp fuse for each of these power sources and both fuses blow. Because they are in different fuse blocks I don't think that is the problem and the fuses blow without the detector connected. I also believe that the circuit is grounded to the chassis as there is no black wires to the battery terminals. So, perhaps a bad ground but that would cause an open circuit rather than one that is shorted. A screw or other penetration to the circuit is more likely. I may have to run all new cables to the detector. In using the 2 wire leads for the new detector I'm inclined to connect power to just one set of batteries rather than both.
__________________
2004 American Eagle, 40L
Cummins 400 ISL, Spartan Chassis
2009 Honda Fit Sport
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01-17-2020, 09:42 PM
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#4
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Senior Member
Join Date: Mar 2009
Posts: 1,700
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One red wire to each battery bank. Yellow wire to propane solenoid. Old CCI detector got its ground source through the coil on the solenoid. Really good stuff when new and functional. Only drew 0.168 amps.
You could ground the yellow wire at the tank and use it for your new detector.
The solenoid valve must be removed from the propane tank.
Richard
__________________
95 Bounder 32H F53
460
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01-18-2020, 06:47 AM
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#5
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Senior Member
Fleetwood Owners Club Spartan Chassis
Join Date: Oct 2019
Posts: 478
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Quote:
Originally Posted by House Husband
One red wire to each battery bank. Yellow wire to propane solenoid. Old CCI detector got its ground source through the coil on the solenoid. Really good stuff when new and functional. Only drew 0.168 amps.
You could ground the yellow wire at the tank and use it for your new detector.
The solenoid valve must be removed from the propane tank.
Richard
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Thanks, Richard. My coach does not have the solenoid shutoff valve. I don't think it was equipped with one in '04 but I will look for a loose yellow wire in the LP bay. But wouldn't that cause an open circuit rather than a direct short?
__________________
2004 American Eagle, 40L
Cummins 400 ISL, Spartan Chassis
2009 Honda Fit Sport
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01-18-2020, 07:10 AM
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#6
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Senior Member
Join Date: Nov 2018
Location: Beaver Dam, Wisconsin
Posts: 5,038
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More troubleshooting:
Disconnect both propane detector yellow wires. Check resistance to ground of each supply wire. (I assume fuses are still blown for this.)
Resistance should extremely high. Low or near zero means a short.
Or, do fuses blow when detector is not connected?
__________________
Paul Bristol
Kodiak Cub 176RD
Nissan Pathfinder 2015
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01-18-2020, 08:17 AM
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#7
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Senior Member
Join Date: Mar 2009
Posts: 1,700
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Quote:
Originally Posted by oldnavycdr
Thanks, Richard. My coach does not have the solenoid shutoff valve. I don't think it was equipped with one in '04 but I will look for a loose yellow wire in the LP bay. But wouldn't that cause an open circuit rather than a direct short?
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CCI went out of business in the 2008 economy down turn. Fleetwood/American Coach used the CCI 7719 until inventory run out. I suspect your coach came with a CCI 7719 and it has been removed.
Link to wiring print.
https://www.google.com/search?q=cci+...SlmqAfM:&vet=1
Richard
__________________
95 Bounder 32H F53
460
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01-18-2020, 03:15 PM
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#8
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Senior Member
Fleetwood Owners Club Spartan Chassis
Join Date: Oct 2019
Posts: 478
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Quote:
Originally Posted by Persistent
More troubleshooting:
Disconnect both propane detector yellow wires. Check resistance to ground of each supply wire. (I assume fuses are still blown for this.)
Resistance should extremely high. Low or near zero means a short.
Or, do fuses blow when detector is not connected?
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The fuses blow when there is no detector connected. I will check the resistance to ground from each of the leads to the detector connection. Of course!
__________________
2004 American Eagle, 40L
Cummins 400 ISL, Spartan Chassis
2009 Honda Fit Sport
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