diag connector wireing connections
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Race Car
Joined: Dec 2006
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From: Tampa Florida
diag connector wireing connections
If you have been following my intake post:
I trying to find on the front Dig connector which colors go to which pins: yellow / black / blue the female portion is all that remains. I don't want to try to remove the boot it may destroy itself on the good part to match up the colors.
While placing the pins 180 degrees the car wants to stall for now the connections are blue yellow black in that order not sure which is up or down. I am assuming blk should be ground and should be on the center pin it is not.
Diagram says idle ground full t.
I trying to find on the front Dig connector which colors go to which pins: yellow / black / blue the female portion is all that remains. I don't want to try to remove the boot it may destroy itself on the good part to match up the colors.
While placing the pins 180 degrees the car wants to stall for now the connections are blue yellow black in that order not sure which is up or down. I am assuming blk should be ground and should be on the center pin it is not.
Diagram says idle ground full t.
Electron Wrangler
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I read your post and did not understand what you were asking....
I'll try to help you but I need a clearer picture of what connector, what you have done so far and what questions remain....
Be as specific as possible there many many things you might mean and you'll get a better & fastest answer the more concise details you give us.
Alan
I'll try to help you but I need a clearer picture of what connector, what you have done so far and what questions remain....
Be as specific as possible there many many things you might mean and you'll get a better & fastest answer the more concise details you give us.
Alan
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From: Davidsonville, MD
I'm not trying to be a dick here. But many of us have been trying to help you through your problems the past few weeks. You've got to stop making up names (and abbreviations) for the parts on your car. Not having pictures makes it very difficult to know what you're talking about unless you are very specific and use the correct terms. Many of us have the same literature, and while the '85 and '86 are unique from all the rest, fortunately there are several of us who own these.
With that said, based on the wire colors you named, and their location, the plug you are referring to is the one for the throttle position switch. You can move the boot. You really don't have a choice. Anyway, the yellow wire hooks to the brown wire. On kraut cars (at least these kraut cars) brown seems to be the color of choice for ground. It makes sense. Brown is the color of dirt, and dirt=ground. Get it? And ground is in the middle position. So the yellow goes to the middle position. The black wire goes to the white wire. And the blue wire goes to the white wire with the red stripe. Making an educated guess and looking at my wiring diagram I'm going to say the black wire goes in the top position, yellow in the middle, and blue on the bottom. I told you already that this connector is called a 3-pin AMP style connector. Learn the terms and take some pics. It makes helping a lot easier.
With that said, based on the wire colors you named, and their location, the plug you are referring to is the one for the throttle position switch. You can move the boot. You really don't have a choice. Anyway, the yellow wire hooks to the brown wire. On kraut cars (at least these kraut cars) brown seems to be the color of choice for ground. It makes sense. Brown is the color of dirt, and dirt=ground. Get it? And ground is in the middle position. So the yellow goes to the middle position. The black wire goes to the white wire. And the blue wire goes to the white wire with the red stripe. Making an educated guess and looking at my wiring diagram I'm going to say the black wire goes in the top position, yellow in the middle, and blue on the bottom. I told you already that this connector is called a 3-pin AMP style connector. Learn the terms and take some pics. It makes helping a lot easier.
Thread Starter
Race Car
Joined: Dec 2006
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From: Tampa Florida
Pictures
http://picasaweb.google.com/tampapix...ey=mJXu7Dbghjw
I have found the problem:
The Diagnostic circuit connector from the Tps to Ecm’s turned to dust. I connected the pins 180 Degrees off, I reversing it this morning started and idles at 650 Rpm’s.
I will now go back into checking all connections and hoses to make sure every thing is tight.
On a note to JHowell
I appreciate the feedback but my lack of complete information is based on total frustration on chasing ghosts. I was told it was the Maf, it was the LH, it was vacuum it was not vacuum from this tread. I substituted the Electronics thanks to Roger which spared may more hours of diagnostics. My question however cryptic was asking for color coding on a part I did not care to remove again. My schooling says don’t start cutting into cables if they are in good condition. It was obvious that the color codes on the Schematic Diagram were as you stated. The TPS did not or at least I could not find a color coding for its pins in any manual. This all came out to a very simple problem that caused a lot of unnecessary work. There is one good point on this is that I know this car better and this adds to trouble shooting problems in the future.
To recap found a washer under the center intake on drivers’ side causing a small air leak.
Found TPS connector 180 Degrees out causing the ECM’s to receive Full Throttle at idle.
Found I like strong coffee and good cigars while working on 928’s.
http://picasaweb.google.com/tampapix...ey=mJXu7Dbghjw
I have found the problem:
The Diagnostic circuit connector from the Tps to Ecm’s turned to dust. I connected the pins 180 Degrees off, I reversing it this morning started and idles at 650 Rpm’s.
I will now go back into checking all connections and hoses to make sure every thing is tight.
On a note to JHowell
I appreciate the feedback but my lack of complete information is based on total frustration on chasing ghosts. I was told it was the Maf, it was the LH, it was vacuum it was not vacuum from this tread. I substituted the Electronics thanks to Roger which spared may more hours of diagnostics. My question however cryptic was asking for color coding on a part I did not care to remove again. My schooling says don’t start cutting into cables if they are in good condition. It was obvious that the color codes on the Schematic Diagram were as you stated. The TPS did not or at least I could not find a color coding for its pins in any manual. This all came out to a very simple problem that caused a lot of unnecessary work. There is one good point on this is that I know this car better and this adds to trouble shooting problems in the future.
To recap found a washer under the center intake on drivers’ side causing a small air leak.
Found TPS connector 180 Degrees out causing the ECM’s to receive Full Throttle at idle.
Found I like strong coffee and good cigars while working on 928’s.
Electron Wrangler
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From: Phoenix AZ
Photos are your friend!
Glad it worked out - we have all suffered our frustrations with 928's!
What helps most is to strip it back to facts - pictures help a lot here, you have to take the diagnostic help you get with a pinch of salt - it can only ever be as good as the info you give us and even then it is very variable... Any 'help' you get can just as easily send you down the wrong track so its best to avoid your own or others suppostitions on the problem...focus on the debug path before random replacements (expensive!).
I know I've been guilty of this myself - others who have BTDT look at the same base symptoms and come up with a simpler more likely root cause or a far easier way to test or fix it.
Bottom line - start with all the cards (and photos!) on the table - its always the fastest way to get to an answer...
You'd be amazed how often it takes weeks to tease the most basic facts out of someone only to discover they really have a quite different problem than they thought
Quite often its self inflicted too
"Oh yes I guess I did just mess with the XYZ just before this started happening" (their comment on day 20 of the discussion)...
Alan
Glad it worked out - we have all suffered our frustrations with 928's!
What helps most is to strip it back to facts - pictures help a lot here, you have to take the diagnostic help you get with a pinch of salt - it can only ever be as good as the info you give us and even then it is very variable... Any 'help' you get can just as easily send you down the wrong track so its best to avoid your own or others suppostitions on the problem...focus on the debug path before random replacements (expensive!).
I know I've been guilty of this myself - others who have BTDT look at the same base symptoms and come up with a simpler more likely root cause or a far easier way to test or fix it.
Bottom line - start with all the cards (and photos!) on the table - its always the fastest way to get to an answer...
You'd be amazed how often it takes weeks to tease the most basic facts out of someone only to discover they really have a quite different problem than they thought
Quite often its self inflicted too
"Oh yes I guess I did just mess with the XYZ just before this started happening" (their comment on day 20 of the discussion)...
Alan
Last edited by Alan; May 4, 2007 at 01:01 PM.
