1987 Grand Marquis: Two error codes

[ComputerFreek]

Hi,

I have a 1987 Grand marquis- 302 (5.0 L?)

I have two error codes:

94- Converter Clutch Control Circuit Failure or the other option
Air diverter solenoid circuit fault

44- Thermactor Air system fault


94 is the one that is confusing me. I can't figure it from googleing it which one applies to me or even how to begin to solve the problem...


44- I'm assuming this has to do with all the plastic horses that are falling apart.

Just looking for a little bit of in sight.

Thanks Kyle.

[86VickyLX]

Hi,

I have a 1987 Grand marquis- 302 (5.0 L?)

I have two error codes:

94- Converter Clutch Control Circuit Failure or the other option
Air diverter solenoid circuit fault

44- Thermactor Air system fault


94 is the one that is confusing me. I can't figure it from googleing it which one applies to me or even how to begin to solve the problem...


44- I'm assuming this has to do with all the plastic horses that are falling apart.

Just looking for a little bit of in sight.

Thanks Kyle.

94 is code 44, but for the other side of the engine. Fix the plastic vacuum lines and try the test again. Both codes are ignorable, they're not important. If you still have issues after you fix the hoses, replace the O2 sensors.

[ComputerFreek]

Oh!!!! That makes sense!!!!

I will have to work on those.... (Oh joy, lol)

I do have another question- it has to deal with the AC. For some unknown reason the clutch will not engage. Two years ago my dad converted it to R128A or something (the newer free-on). This year I can't get it to turn on. We have refilled it and no luck. We replaced the Low level switch if you will on the condenser ( Round cylinder, the one with the two wires coming off towards the drivers seat. ) Either then that we have no idea what to do...

[gadget73]

Have you verified that its got enough pressure? It needs to be more than 30 psi or it won't engage. Normally with it not running, I'd expect to see 70 psi or better. Running, about 20-30 on the low side and around 200 on the high side, depending on temperature.

[ComputerFreek]

Well thats the thing.... When we test the PSI levels on both sides they change so fast that its hard to get a correct measure. But we also have the problem of not being able to get the clutch to engage even when we short around the low pressure switch. I'm wondering if its the high pressure switch, but I'm unable to find it....

[1987cp]

I feel ripped off now .... none of my cars came with plastic horses, not even the two '87s.


My no-brainer method for making sure my A/C system at least worked was to unplug the wires to the pressure switch (on the side of the dessicant canister) and jump across them. When the compressor started running, I at least knew I had a mostly-functional system and figured it was an OK investment to continue with the planned R-134 upgrade.

[86VickyLX]

Well thats the thing.... When we test the PSI levels on both sides they change so fast that its hard to get a correct measure. But we also have the problem of not being able to get the clutch to engage even when we short around the low pressure switch. I'm wondering if its the high pressure switch, but I'm unable to find it....

Ok, I want you to do this now. Run the car in self test mode again, this time, put the ac on. If the computer sees that you put the ac on, the a/c wot relay is good. If it doesn't throw a code for that, the relay or the computer has shit the bed. Also make sure that the clutch wiring still has a good ground.

[gadget73]

There is no high pressure switch, so thats why you can't find it.

I can't find my EVTM right now to run you through which wires to check for what, but the only thing in the clutch power circuit for the AC is the switch at the climate control unit itself, the low pressure switch, and the cutout relay that is controlled by the ECM. I just can't remember if power goes to the pressure switch or the relay first. The relay should be the one near the washer fluid bottle that lives by itself under the plastic cover.

[ComputerFreek]

Ok, I want you to do this now. Run the car in self test mode again, this time, put the ac on. If the computer sees that you put the ac on, the a/c wot relay is good. If it doesn't throw a code for that, the relay or the computer has shit the bed. Also make sure that the clutch wiring still has a good ground.

Okay okay okay okay.. Wait a min.. Where is this ground wire... I just checked some notes my dad wrote in our big bleeping book and it saids bad ground.... Where is this ground wire that you speak of? I want to make sure I checked everything... ( not sure where it is... )

[86VickyLX]

Okay okay okay okay.. Wait a min.. Where is this ground wire... I just checked some notes my dad wrote in our big bleeping book and it saids bad ground.... Where is this ground wire that you speak of? I want to make sure I checked everything... ( not sure where it is... )

The clutch plug. If I'm not mistaken, the ground is located somewhere on the passenger side fender, back towards the hood hinge. Bolted on by an 8 or 7mm bolt.

Do you have a voltmeter?

[ComputerFreek]

The clutch plug. If I'm not mistaken, the ground is located somewhere on the passenger side fender, back towards the hood hinge. Bolted on by an 8 or 7mm bolt.

....................... Oh boy..... I'm assuming your talking about one of the two wiring harness over there? If so - this is going to be a lot of fun.Those wires are a mess, rust, etc.

Do you have a voltmeter?

Yes I do sir.

[86VickyLX]

....................... Oh boy..... I'm assuming your talking about one of the two wiring harness over there? If so - this is going to be a lot of fun.Those wires are a mess, rust, etc.



Yes I do sir.

Is it a digital meter?

Unplug clutch plug, turn key on to run or accessory, use one lead and attach it to negative battery terminal, with the other, probe the clutch plug. One of those wires should have 12 volts, the other should read 0.0 volts. The 0.0 one is your ground. If you get this reading your ground is fine.

[ComputerFreek]

I will have to check tomorrow.. well.. later today.. its 1Am right now but i think you know that considering you live in Nj.

Got to love work at 5 am..... Lucky no work Thursday, thank god.

I thank you for your help. I will let you guys know my findings.

Thanks again,
Kyle

[86VickyLX]

I will have to check tomorrow.. well.. later today.. its 1Am right now but i think you know that considering you live in Nj.

Got to love work at 5 am..... Lucky no work Thursday, thank god.

I thank you for your help. I will let you guys know my findings.

Thanks again,
Kyle

Sure, no problem. Where are you located?

[ComputerFreek]

Metro Detroit area- Michigan

Thanks again,

Hitting the sack, night