Bench testing suspension compressor

[tylerdurden2816]

Hey guys, I wanna test my compressor before I spend the money on a new one, can anyone give me a step-by-step how to do it?

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[Zack]

Give it positive and negative.

[tylerdurden2816]

Give it positive and negative.With the car running, can I do that straight from jump wires connected to the battery, to the black and red pinhole connections on the compressor?

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[offroadkarter]

With the car running, can I do that straight from jump wires connected to the battery, to the black and red pinhole connections on the compressor?

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Do you want to just test if the compressor works or are you trying to jump it to fill the bags?

If you're trying to fill the bags, you need to make sure the solenoids open up which they'll only remain open for a certain window of time.

Normally when I was ever testing a car with a bad compressor, I'd just slap a known good compressor on since its so easy to change. You don't need the car running, just key on, open/close a door so it trips the solenoids open (as long as it isn't at ride height, you'll hear a click when they open), then you could jump the compressor to put air in the bags.

I have never had to jump a compressor before, if yours is dead and looks rusty 95% chance it's the problem. Happens to everyone at some point.

[tylerdurden2816]

Do you want to just test if the compressor works or are you trying to jump it to fill the bags?



If you're trying to fill the bags, you need to make sure the solenoids open up which they'll only remain open for a certain window of time.



Normally when I was ever testing a car with a bad compressor, I'd just slap a known good compressor on since its so easy to change. You don't need the car running, just key on, open/close a door so it trips the solenoids open (as long as it isn't at ride height, you'll hear a click when they open), then you could jump the compressor to put air in the bags.



I have never had to jump a compressor before, if yours is dead and looks rusty 95% chance it's the problem. Happens to everyone at some point.I'm trying to test it before replacing it. So, I don't have another one yet, I want to test this one to see if it will even turn on. I'm pretty sure it's bad, but at $120 minimum, I'd really like to be positive first.

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[offroadkarter]

I'm trying to test it before replacing it. So, I don't have another one yet, I want to test this one to see if it will even turn on. I'm pretty sure it's bad, but at $120 minimum, I'd really like to be positive first.

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At that point I'd just disconnect the airline and jump it.

I don't remember the pinout for our cars, these may be the same

https://www.crownvic.net/drock96marquis/RAS.htm

[tylerdurden2816]

At that point I'd just disconnect the airline and jump it.



I don't remember the pinout for our cars, these may be the same



https://www.crownvic.net/drock96marquis/RAS.htmThe connector has four points, and I saw a red and black, so I assume I can just go direct from the battery to those with a couple jump wires.

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[offroadkarter]

The connector has four points, and I saw a red and black, so I assume I can just go direct from the battery to those with a couple jump wires.

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I mean, you can't make it any worse than non working

[tylerdurden2816]

I mean, you can't make it any worse than non working[emoji23] my thoughts too lol! I was just looking for somebody who may have done it before to confirm that was correct to avoid a false negative.

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[justbob]

BK - Ground
PK - Solenoid vent
BK - Ground
GY/RD - Compressor relay, switched power



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[tylerdurden2816]

BK - Ground
PK - Solenoid vent
BK - Ground
GY/RD - Compressor relay, switched power



Sent from my iPhone using Tapatalk ProMy compressor doesn't have the same colors you're describing. Held looking into the holes like in the first picture, the individual pinholes look like a compass ("North" being the hole closest to the connector clip), and their wire colors are as follows:

North-Red
East-Blue
South-Green
West-Black

Keeping this configuration in mind, can I run a jump wire from my car battery's (-) to the black(West) hole and another jump wire from car battery's (+) to the red(North) hole, with the car running, to properly test if this compressor will run anymore?https://uploads.tapatalk-cdn.com/20190621/a24f812ff5925221a524a6abda8c22 46.jpghttps://uploads.tapatalk-cdn.com/20190621/ff4f095c27ffcaa5dbc4639b52859c 8e.jpg

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[tylerdurden2816]

My compressor doesn't have the same colors you're describing. Held looking into the holes like in the first picture, the individual pinholes look like a compass ("North" being the hole closest to the connector clip), and their wire colors are as follows:

North-Red
East-Blue
South-Green
West-Black

Keeping this configuration in mind, can I run a jump wire from my car battery's (-) to the black(West) hole and another jump wire from car battery's (+) to the red(North) hole, with the car running, to properly test if this compressor will run anymore?

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[RubberCtyRauder]

After seeing how crusty the motor is.. it's prolly toast..bench test it for piece of mind.

[tylerdurden2816]

After seeing how crusty the motor is.. it's prolly toast..bench test it for piece of mind.My thoughts exactly. Is the way I described a proper way to test it?

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[justbob]

My compressor doesn't have the same colors you're describing. Held looking into the holes like in the first picture, the individual pinholes look like a compass ("North" being the hole closest to the connector clip), and their wire colors are as follows:

North-Red
East-Blue
South-Green
West-Black

Keeping this configuration in mind, can I run a jump wire from my car battery's (-) to the black(West) hole and another jump wire from car battery's (+) to the red(North) hole, with the car running, to properly test if this compressor will run anymore?https://uploads.tapatalk-cdn.com/20190621/a24f812ff5925221a524a6abda8c22 46.jpghttps://uploads.tapatalk-cdn.com/20190621/ff4f095c27ffcaa5dbc4639b52859c 8e.jpg

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What about the vehicle side colors? Jump the one on the flat side of the connector with the one directly across from it.


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[tylerdurden2816]

What about the vehicle side colors? Jump the one on the flat side of the connector with the one directly across from it.


Sent from my iPhone using Tapatalk ProGuess they are red, grey/red, and two blacks! Weird they didn't use the same colors on the compressor.https://uploads.tapatalk-cdn.com/20190623/01c2ab01b35d029933893c04105a48 6f.jpg

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[tylerdurden2816]

So here was my jump-wire benchtest! Two wires w/ stripped ends straight off the battery with the car running, into the two pinholes as shown in the picture below. The compressor never moved. Was this done correctly and my compressor is positively dead then?https://uploads.tapatalk-cdn.com/20190623/927da2939e0984480152d4c290b0e7 94.jpghttps://uploads.tapatalk-cdn.com/20190623/53342b19b88d64d914268fb32ae040 08.jpghttps://uploads.tapatalk-cdn.com/20190623/4f2e7fa5993678289b6555fb65544c 67.jpg

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[justbob]

Skip the pink altogether as it is for releasing air. The Grey/red hot is confirmed as the hot. This “shouldn’t” matter which of the two remaining wires you use as they are both listed as grounds. I’d try the other ground for kicks. Because if it is wired up separate internally then it would matter which.


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[tylerdurden2816]

Skip the pink altogether as it is for releasing air. The Grey/red hot is confirmed as the hot. This “shouldn’t” matter which of the two remaining wires you use as they are both listed as grounds. I’d try the other ground for kicks. Because if it is wired up separate internally then it would matter which.


Sent from my iPhone using Tapatalk ProI ran the positive jumper to the grey/red and the negative jumper to the black wire on the flat side and got nothing. Are you suggesting I redo the test with the positive jumper to the grey/red and the negative jumper to the other black wire next to it instead of the one across from it?

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[justbob]

I ran the positive jumper to the grey/red and the negative jumper to the black wire on the flat side and got nothing. Are you suggesting I redo the test with the positive jumper to the grey/red and the negative jumper to the other black wire next to it instead of the one across from it?

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Yes.


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[tylerdurden2816]

Yes.


Sent from my iPhone using Tapatalk ProRetested as described, positive to the Grey/Red, and negative jumper to the Black next to it. It did not run the compressor. Does this mean it's definitely dead then?https://uploads.tapatalk-cdn.com/20190625/8c43dd30ad6caee57429970b5aab01 80.jpghttps://uploads.tapatalk-cdn.com/20190625/7f3b2bea2b8234418c21b4f38cb1cf 36.jpg

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[justbob]

Dead dead.


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[GetMeMyStogie]

Dead, but maybe can be revived. Remove the 4 screws holding the pump to the electric motor (some may break, but as long as there's at least 1 good screw you should be okay. Now, without trying to pull the two halves apart, twist them until they break free from each other. You'll probably need to use a hammer to break through the crustiness.
If you can get the two halves to twist apart, screw them back together and the pump should work again. I was able to get a few more months out of a couple of air pumps by doing this. Not perfect, but buys you time while you source a proper replacement.

[tylerdurden2816]

Finally got around to replacing the compressor, bought the $120 one from Suncore, plugged it in and it started right up! Thank you to everyone who helped get me to the finish line of this project!https://uploads.tapatalk-cdn.com/20190704/0ed9e1b9b807a885d744e663cfcfa7 e5.jpg

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