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05-29-2013, 03:47 AM
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#1
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Senior Member
Join Date: Oct 2012
Posts: 385
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What Is This....
This unit is bolted on the outer frame surrounding the main radiator on the right hand side of Rv, which you can get too via wheelarch area.
Sorry the picture is not too good.
It has two large terminal connectors with large feed cables to them, also a few other smaller cables to it.
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05-29-2013, 05:29 AM
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#2
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Senior Member
Join Date: Aug 2011
Location: Near Toronto, Canada
Posts: 1,842
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It's a solenoid, and given the location, I'd have to say its the coach / house battery isolator.
If you don't already know, it is basically an electrically-operated switch, when the engine is running it completes the circuit between the two large cables to allow them to charge off the alternator. When you shut off the engine the power to it stops and the connection is broken. This keeps you from running down the engine starting battery by using too much power in the m/h.
__________________
Ted 'n' Laurie, plus Jackson (aka Deputy Dog, the Parson Russell Terrier 'fur kid') and, Rylie (who crossed the Rainbow Bridge June 14, 2012).
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05-29-2013, 06:03 AM
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#3
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Easton, Ks
Posts: 2,836
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I take it is a 1999 F53 or newer.
If so that is your Starting Motor Relay.
This relay connects the battery power to the starter solenoid.
Looks like it has a lot of dielectric grease on it to keep the cable connections from corroding.
/
__________________
Bill
1995 COACHMEN Santara 350FL on a 1994 Ford F53
subford@gmail.com
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05-29-2013, 03:26 PM
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#4
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Registered User
Join Date: Mar 2013
Posts: 1,919
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Quote:
Originally Posted by subford
I take it is a 1999 F53 or newer.
If so that is your Starting Motor Relay.
This relay connects the battery power to the starter solenoid.
Looks like it has a lot of dielectric grease on it to keep the cable connections from corroding.
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Yup I would agree. The tell tale sign is the factory wiring harness. You can tell its a starter related circuit based on the rubber wire holder.
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05-29-2013, 03:49 PM
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#5
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,452
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Do the smaller cables connect to the same studs as the larger wires?? If so it is a binding post. If they connect to smaller terminals it is a solenoid as suggested. Can't tell how long/high the black thing is. If it is a couple of inches high most likely a solenoid.
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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05-29-2013, 04:35 PM
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#6
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Registered User
Join Date: Mar 2013
Posts: 1,919
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Quote:
Originally Posted by YC1
Do the smaller cables connect to the same studs as the larger wires?? If so it is a binding post. If they connect to smaller terminals it is a solenoid as suggested. Can't tell how long/high the black thing is. If it is a couple of inches high most likely a solenoid.
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These early Ford solenoids usually had a larger cable from the battery on one side. Looks to be the right side. Usually there will be some other wires connected to this and that power goes to the underhood fuse box. The other wire in the rubber shell goes to the starter solenoid. The small wire that uses a round terminal is the relay trigger wire.
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05-29-2013, 05:56 PM
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#7
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Easton, Ks
Posts: 2,836
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As I said above this is the Starting Motor Relay and not the Starter Solenoid.
The Starter Solenoid is mounted to the Starter.
__________________
Bill
1995 COACHMEN Santara 350FL on a 1994 Ford F53
subford@gmail.com
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05-29-2013, 06:02 PM
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#8
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Registered User
Join Date: Mar 2013
Posts: 1,919
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Quote:
Originally Posted by subford
As I said above this is the Starting Motor Relay and not the Starter Solenoid.
The Starter Solenoid is mounted to the Starter.
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or starter solenoid relay 
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05-29-2013, 08:00 PM
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#9
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Easton, Ks
Posts: 2,836
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Yes this relay does operate the solenoid down on the starter.
__________________
Bill
1995 COACHMEN Santara 350FL on a 1994 Ford F53
subford@gmail.com
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05-29-2013, 08:03 PM
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#10
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Registered User
Join Date: Mar 2013
Posts: 1,919
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Quote:
Originally Posted by subford
Yes this relay does operate the solenoid down on the starter.
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Dude, seriously I was just messing with you....
EDIT, looks like you changed your post.
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05-30-2013, 12:10 PM
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#11
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Senior Member
Join Date: Oct 2012
Posts: 385
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Quote:
Originally Posted by YC1
Do the smaller cables connect to the same studs as the larger wires?? If so it is a binding post. If they connect to smaller terminals it is a solenoid as suggested. Can't tell how long/high the black thing is. If it is a couple of inches high most likely a solenoid.
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Yes the smaller wires go to one of the posts and the unit is not very high.
Thank You for all Replies..
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