1994 AC removal - Defender Source
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  #1  
Old October 31st, 2007, 10:09 PM
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Daniel Marcello
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1994 AC removal

My truck will not fire up. It seems like the sparks are firing but no gas is getting to the engine. the fuel pump still kicks on when i turn the key, so i figure it is still working.

I read up and it seems like a lot of problems with the truck not starting has to do with the 2 silver relays that control the fuel pump. I removed the upper vent system and then unscrewed the 3 bolts that are ontop of the AC unit and all of the other bolts I could see. The AC unit will not come out. it doesn't even move which means i still have some large bolts holding it in there. can someone point me in the right direction or shoot me some photos of the area and what it looks like and were the bolts might be that are holding it in?

also if you might know why my truck isn't running that would help too
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  #2  
Old November 3rd, 2007, 02:09 PM
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Daniel Marcello
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figured out how to take the AC unit out...replaced fuel pump relays, and truck fired up like it was brand new case closed.
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  #3  
Old November 3rd, 2007, 02:28 PM
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Gary Young
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Glad to hear you got it running! Can you share the secret to getting the AC unit out?
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  #4  
Old November 3rd, 2007, 03:31 PM
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I was able to reach around the unit [where is merv when you need him] and get to the two relays without pulling the AC assembly.

YMMV

Ron

PS everyone should call mike at LR west chester and order two spare relays to carry around with them.
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  #5  
Old November 3rd, 2007, 03:31 PM
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Jim Cheney
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2 fuel pump relays? I have one fuel pump relay attached to a blue connector, and one attached to a black connector, which is the ECU relay.
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  #6  
Old November 3rd, 2007, 09:22 PM
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Charles Galpin
'94 D90 ST, '63 SeriesIIA
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I have pictures of my AC removal here which shows how I did it.

http://lhsw.com/gallery/AC

I can never remember which relays are which. I need to replace my fuel pump relay as part of my stalling troubleshooting. I don't recall seeing a blue connector, but will check tomorow, thanks.
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  #7  
Old November 4th, 2007, 07:33 AM
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sal gorriceta
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dan, nice job and where did you get the relays? sal
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  #8  
Old July 25th, 2012, 09:47 AM
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Marc-Andre Leger
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I"m looking for information or instructions on A/C removal on my 1994 NAS D-90. As I mentionned before, it useless to me in a ST mostly used in Montreal (Canada). I was looking for the link shown in this thread, but it seems to have been removed.

------ Follow up post added July 25th, 2012 09:50 AM ------

OK, found this on another thread:

Removing it is simplicity itself, but you need to have the system discharged first by a technician at a dealer or AC place.

The only thing to really watch for is the fittings, especially the ones that enter the condensor which sits in front of the vehicles radiator. The thing is made of aluminum and the fittings are fragile.

There is also residual pressure left in the system even after its evacuated, so be careful while loosening the first fitting.

The parts of the system are as follows:
Underdash vent assembly
Underdash blower unit
Hoses
Compressor, on top of the motor
Condensor in front of radiator
Little canister under the PS resevoir
Wiring

Disconnect all the lines, finesse them out, and then just remove each piece individually. Too easy.
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  #9  
Old July 25th, 2012, 09:59 AM
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If cgalpin's link has expired or changed, have him send you the new one - it was a great pictorial of the process. It's just a post or two up from yours.
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  #10  
Old July 25th, 2012, 10:02 AM
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Marc-Andre Leger
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Yes, the link doesn't work.
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  #11  
Old July 25th, 2012, 10:14 PM
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Charles Galpin
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Yeah I lost the desire to get my gallery up after new years given I also had pictures of my kids up there as well.

I'll send you what I have in a reasonable size for email. If you want higher res ones I'll have to send them in batches.
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  #12  
Old July 26th, 2012, 01:27 AM
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Jason Lavender
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Quote:
Originally Posted by cgalpin View Post
Yeah I lost the desire to get my gallery up after new years given I also had pictures of my kids up there as well.

I'll send you what I have in a reasonable size for email. If you want higher res ones I'll have to send them in batches.
Can you send it to me as well? Since my AC system is setup to run OBA I plan to keep it as such and yank & sell the AC unit (plus it'll give more room under the dash, which is a tight squeeze with AC in).
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  #13  
Old July 29th, 2012, 04:03 PM
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Marc-Andre Leger
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Thanks for the help, my AC is now removed. In doing, I saw the radiator part was non-serviceable and the coolant had all beed expunged, so it was easier than having a pressurized system. I still have to remove the compressor itself, as the bolts will need some loosener to come apart and the bracket is behind the water pump, no rush there. I also saw, at the same time, that my oil lines really need to be changed real real soon ;-)
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  #14  
Old July 29th, 2012, 05:14 PM
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Chris
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Good work!
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