2005 Excursion 6.0 washer pump not pumping
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5th Gear
Joined: Sep 2022
Posts: 5
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From: Ontario, Canada
2005 Excursion 6.0 washer pump not pumping
After lurking for a bit can see that the washer pump not working is not that uncommon. We have just bought a 2005 excursion 6.0psd. Has a few kinks to work out wiring wise. On that note what I need to fix asap is the washer. Front washer, Works but does not pump fluid. Rear was disconnected by previous owner because he said the motor on it would not stop running but would not push the wipers.
For the front already checked fuses, bumped the pump it is still working. So my next guess is something in the wiring or relays. Only problem i have at this moment is I don't have my shop manuals yet. Ordered but have not come in as of yet. Is there anywhere I can locate the wiring diagrams so I can start the repair process. I don't have the luxury of waiting 10 days for my manual to come in.
For the front already checked fuses, bumped the pump it is still working. So my next guess is something in the wiring or relays. Only problem i have at this moment is I don't have my shop manuals yet. Ordered but have not come in as of yet. Is there anywhere I can locate the wiring diagrams so I can start the repair process. I don't have the luxury of waiting 10 days for my manual to come in.
Mountain Pass
Joined: Jul 2017
Posts: 172
Likes: 5
After lurking for a bit can see that the washer pump not working is not that uncommon. We have just bought a 2005 excursion 6.0psd. Has a few kinks to work out wiring wise. On that note what I need to fix asap is the washer. Front washer, Works but does not pump fluid. Rear was disconnected by previous owner because he said the motor on it would not stop running but would not push the wipers.
For the front already checked fuses, bumped the pump it is still working. So my next guess is something in the wiring or relays. Only problem i have at this moment is I don't have my shop manuals yet. Ordered but have not come in as of yet. Is there anywhere I can locate the wiring diagrams so I can start the repair process. I don't have the luxury of waiting 10 days for my manual to come in.
For the front already checked fuses, bumped the pump it is still working. So my next guess is something in the wiring or relays. Only problem i have at this moment is I don't have my shop manuals yet. Ordered but have not come in as of yet. Is there anywhere I can locate the wiring diagrams so I can start the repair process. I don't have the luxury of waiting 10 days for my manual to come in.
I would check all of the pipes for pinch or disconnection. If the pumps working there's no reason for it to not get to the cowl screen nozzles.
Thread Starter
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5th Gear
Joined: Sep 2022
Posts: 5
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From: Ontario, Canada
All the lines are good nothing appears to be pinched or disconnected. When the pump was bumped it'll run. But when it's plugged back in nothing. When I metered it out I got 12v. On the green and violet. On the ground I have no voltage coming across the harness. But I have ground if I go across the chasis.
So I bypassed the ground temporarily. So it's working. So its definately a grounding issue. But I need to find the original ground to do a proper repair. I'm off work tomorrow so I would like to get a jump on it. Is there anywhere I can find the wiring diagrams?
So I bypassed the ground temporarily. So it's working. So its definately a grounding issue. But I need to find the original ground to do a proper repair. I'm off work tomorrow so I would like to get a jump on it. Is there anywhere I can find the wiring diagrams?
Last edited by LennyR; Sep 11, 2022 at 09:29 AM. Reason: bypassed the ground
Fleet Mechanic
Joined: May 2017
Posts: 1,314
Likes: 103
From: TN
All the lines are good nothing appears to be pinched or disconnected. When the pump was bumped it'll run. But when it's plugged back in nothing. When I metered it out I got 12v. On the green and violet. On the ground I have no voltage coming across the harness. But I have ground if I go across the chasis.
So I bypassed the ground temporarily. So it's working. So its definately a grounding issue. But I need to find the original ground to do a proper repair. I'm off work tomorrow so I would like to get a jump on it. Is there anywhere I can find the wiring diagrams?
So I bypassed the ground temporarily. So it's working. So its definately a grounding issue. But I need to find the original ground to do a proper repair. I'm off work tomorrow so I would like to get a jump on it. Is there anywhere I can find the wiring diagrams?
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
I have no idea what you mean by "bumping the pump". You might want to explain that..
The pump is a DC motor so it's reversible by changing the polarity of the current running through it. Internal check valves for each outlet prevent backflow from the "wrong" outlet.
With power off, both leads of the pump motor connector should read a direct connection to ground. Electrical directional control of the motor is accomplished by switching a single-pole double throw relay that changes the output from a ground to a hot connection. There's a relay for this purpose in both the front and rear wiper motor modules. Since the rear motor module is disconnected, you have your answer...
The pump is a DC motor so it's reversible by changing the polarity of the current running through it. Internal check valves for each outlet prevent backflow from the "wrong" outlet.
With power off, both leads of the pump motor connector should read a direct connection to ground. Electrical directional control of the motor is accomplished by switching a single-pole double throw relay that changes the output from a ground to a hot connection. There's a relay for this purpose in both the front and rear wiper motor modules. Since the rear motor module is disconnected, you have your answer...
Hotshot
Joined: Jan 2004
Posts: 19,762
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From: St Louis
Thread Starter
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5th Gear
Joined: Sep 2022
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From: Ontario, Canada
Bumping the pump. I hooked it directly to power from the battery to make sure that it wasn't seized.
I'll try hooking back up the rear wiper. See if that works.
My problem is not having the wiring diagrams yet in order to trouble shoot.
I'm a master electrician. Just not an automotive electrical tech.
I fully understand relays but I need to know where it is going and where they are located.
I have absolutely nothing, no manuals no stickers on the covers, they had gotten lost over the years. so im going in blind until all of my tech manuals and service manuals come in.
By any chance do you know where these relays are located?
I'll try hooking back up the rear wiper. See if that works.
My problem is not having the wiring diagrams yet in order to trouble shoot.
I'm a master electrician. Just not an automotive electrical tech.
I fully understand relays but I need to know where it is going and where they are located.
I have absolutely nothing, no manuals no stickers on the covers, they had gotten lost over the years. so im going in blind until all of my tech manuals and service manuals come in.
By any chance do you know where these relays are located?
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@projectSHO89 What website or program is this that's providing the digital wiring diagrams for the Excursion? I like it.
Lead Driver
Joined: Oct 2010
Posts: 5,420
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From: Ouray, CO
I had same problem, turned out there was a kink in the hose where it exits the pump. I bought a new pump replaced it same problem, it pumped sitting on the headlight, installed it no flow.
I ended up adding 6-8 Inches of extra hose - problem solved. Now I have spare pump
I ended up adding 6-8 Inches of extra hose - problem solved. Now I have spare pump
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