Electrical help needed in Littlestown, PA
10-10-2009, 11:29 PM
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Location: Littlestown, PA
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Electrical help needed in Littlestown, PA
I bought a 1982 928 project...mechanically nice, but the PO butchered the wiring. Gauge lights were working, not not....which is the same story with the AC compressor. Radio harness has been hacked at least twice judging from the splices (and lack of radio). Fuses are good. I tried to trace the wires, but I'm at a loss on the dash lights and the AC compressor...and the diagrams in the Porsche manual are not the easiest to follow. Any help would be greatly appreciated!
Neil Samuels
Littlestown, PA
Neil Samuels
Littlestown, PA
10-11-2009, 12:03 AM
#2
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The gray area at the top of the page is the Central Electric Panel.
- All lines inside this gray area represent the wires behind the Panel. Connected wires are shown by dots where they cross.
- The Roman numerals show the relay positions. These are identified on the panel, but you will need a flashlight to read them. Go to our web site. Click to enter. Click on the + by 928 Fuse/Relay Charts. Click on 82. You will find a diagram of the Relays and the Fuses.
- The relay diagrams show the terminal numbers (which are standardized), and the basic mechanism inside the relay.
The numbers at the bottom of the gray area show the Plug terminal connections. The plugs are NOT shown on our relay charts. The plugs are lettered left to right, starting with A on the left end. There is no I (i) plug. The shorter plugs in the center are out of sequence - they are Y and Z. The terminals on each plug are arranged:
4 8
3 7
2 6
1 5
Therefore, "E6" is the next-to-bottom terminal on the right side of the 5th plug from the left end.
The wiring in the car is shown by solid or dashed lines. The solid lines indicate a solid color - for example all unswitched ground wires are solid brown. All switched ground wires are dashed, and indicate a brown wire with a colored stripe. Other dashed wires are different base colors with a thin stripe of a different color. For example, the wire that supplies power to the turn signal flasher is a dashed line marked "bk/ye", showing a black wire with a yellow stripe.
The gray boxes in the main field are devices in the car, such as the emergency flasher switch. The numbers around the box show the connecting terminals (again, the same standardized numbers).
The small boxes with Roman numbers/Arabic numbers show a circuit jump to a different area of the diagram. For example, there are several such boxes connected to the emergency flasher switch. One such box on a black/blue wire is marked "XI/1". This means that the black/blue wire leading to the box continues on Part XI in area 1. The areas are the numbers at the bottom of the page. The box that we are discussing is located at IV/20. You will go to Part XI, which is on Page 97-141, look in area 1 and find a black/blue wire misidentified as VI/20 - it should be IV/20. This show the continuation of the circuit.
The line at the bottom of the page shows chassis ground. The numbers in circles are the major ground points, where you will find several brown wires connected to the body or the engine.
Hope that this helps a little bit.
- All lines inside this gray area represent the wires behind the Panel. Connected wires are shown by dots where they cross.
- The Roman numerals show the relay positions. These are identified on the panel, but you will need a flashlight to read them. Go to our web site. Click to enter. Click on the + by 928 Fuse/Relay Charts. Click on 82. You will find a diagram of the Relays and the Fuses.
- The relay diagrams show the terminal numbers (which are standardized), and the basic mechanism inside the relay.
The numbers at the bottom of the gray area show the Plug terminal connections. The plugs are NOT shown on our relay charts. The plugs are lettered left to right, starting with A on the left end. There is no I (i) plug. The shorter plugs in the center are out of sequence - they are Y and Z. The terminals on each plug are arranged:
4 8
3 7
2 6
1 5
Therefore, "E6" is the next-to-bottom terminal on the right side of the 5th plug from the left end.
The wiring in the car is shown by solid or dashed lines. The solid lines indicate a solid color - for example all unswitched ground wires are solid brown. All switched ground wires are dashed, and indicate a brown wire with a colored stripe. Other dashed wires are different base colors with a thin stripe of a different color. For example, the wire that supplies power to the turn signal flasher is a dashed line marked "bk/ye", showing a black wire with a yellow stripe.
The gray boxes in the main field are devices in the car, such as the emergency flasher switch. The numbers around the box show the connecting terminals (again, the same standardized numbers).
The small boxes with Roman numbers/Arabic numbers show a circuit jump to a different area of the diagram. For example, there are several such boxes connected to the emergency flasher switch. One such box on a black/blue wire is marked "XI/1". This means that the black/blue wire leading to the box continues on Part XI in area 1. The areas are the numbers at the bottom of the page. The box that we are discussing is located at IV/20. You will go to Part XI, which is on Page 97-141, look in area 1 and find a black/blue wire misidentified as VI/20 - it should be IV/20. This show the continuation of the circuit.
The line at the bottom of the page shows chassis ground. The numbers in circles are the major ground points, where you will find several brown wires connected to the body or the engine.
Hope that this helps a little bit.
10-12-2009, 05:56 PM
#4
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That would be great! Funny...you were in front of me at LHS on Saturday night. My son thought you 928 was me until he saw I was behind you (in my POJ Taurus...). Ironic. Please send me a PM with you phone number. There is a few small things that I want to get done on my 928...not the least of which is to have someone familiar with these cars give it a good once over. The more that I see of the PO's work, the more scared I get.
Neil
Neil
