Quicky Quiz

tekenaar · 01-23-2005

While doing some research in Opel wiring diagrams for another switched 12V source, I happened upon this little wiring anomaly between the '68 and '69 wiring diagrams, so let me pose this here as a little brainteaser.

What is the only wiring change between the '68 and '69 model year wiring diagrams? Hint: think starting circuit . . .

nobody · 01-23-2005

well if I were to take a guess in 68 a GT was 1.9 0nly but 69 had the 1.1 available so the starter wiring is on the other side and uses different wires?
BTW delivery was confimed, Thanks Otto.

tekenaar · 01-23-2005

Anyone else want to take a stab at it . . . no prizes, just interesting.

tekenaar · 01-24-2005

Opel changed their ignition coil + wiring from full switched 12V source at all times in '68 to full switched 12V during start only (direct connect, second wire from starter solenoid) and resistance wire connection (~9V) at all other times (ignition on/run mode) in '69 . . . at least according to published wiring diagrams.

That means that they used an internal resistance coil, like the Bosch "blue" coil and most aftermarket replacement coils, in the cars prior to the '69 models and non-resistance coils from then forward. Anyone have a '68 or earlier model that can verify this . . . 2 wires (black/clear) on coil + connector?

oldopelguy · 01-24-2005

Both my '67's, the Kadett and the Admiral are wired without the resistor wire, full 12V to the coil. Can't vouch for the GT's, but probably the same deal.

tekenaar · 01-24-2005

Originally Posted by oldopelguy

Both my '67's, the Kadett and the Admiral are wired without the resistor wire, full 12V to the coil. Can't vouch for the GT's, but probably the same deal.

This doesn't really apply to any GTs, since the relatively few actual '68 GTs (31) were dealer demo models and weren't released until 3rd quarter of '68 anyways. For that reason, I believe they were all wired like the '69 models.

First opel 1981 · 01-24-2005

Heh, heh, I knew the answer
I found out the hard way when I was poor and swapping parts from car to car.
My 69 was an early model and didn't have the resistor installed. So when I took the coil out of a wrecked Gt and put it into mine I had this stupid littel thing that pissed me off.
I would start and drive fine, then al of a sudden the car would die. Turns out I needed a ballast resistor installed.
Worked perfect after that.

Mach1Tom · 01-24-2005

Otto, That was going to be my guess. No, honestly, I knew that.

I was actually sorting through some Opel Technical Service Bulletins over the weekend. There is one that talks about this & also shows pictures on how to identify the different factory Bosch coils.

~ Tom C

tekenaar · 02-01-2005

Originally Posted by Mach1Tom

Otto, That was going to be my guess. No, honestly, I knew that.

I was actually sorting through some Opel Technical Service Bulletins over the weekend. There is one that talks about this & also shows pictures on how to identify the different factory Bosch coils.

~ Tom C

Thanks, Tom . . . very useful info to add to my collection.

01-23-2005	#1 (permalink)
tekenaar Cunning Linguist Join Date: Mar 2002 Location: Plano, TX 75074 Posts: 4,441 Real Name: Otto Provided Answers: 13	Unanswered: Quicky Quiz While doing some research in Opel wiring diagrams for another switched 12V source, I happened upon this little wiring anomaly between the '68 and '69 wiring diagrams, so let me pose this here as a little brainteaser. What is the only wiring change between the '68 and '69 model year wiring diagrams? Hint: think starting circuit . . . __________________ 1960: ♥ '61 Rekord PII 1.7 3S 3.9 ♥ '69 Kadett LS 'sprint' 1.9 3A 3.18 1970: ♥ '70 GT 1.9 4S 3.44 ♥ '72 GT 2.2SSD 5S 3.44 ♥ '72 GT 2.4FI 5S 3.44P ♥ '73 GT 1.9FI 4S 3.44 ♥ '75 1900 1.9FI 4S 3.44 1980: ♥ '85 Bitter SC 3.9FI 5S 3.44P 2000: ♥ '09 Solstice GXP Coupe 2.0 SIDI VVT Turbo 5S 3.73P

01-23-2005	#3 (permalink)
tekenaar Cunning Linguist Join Date: Mar 2002 Location: Plano, TX 75074 Posts: 4,441 Real Name: Otto Provided Answers: 13	Anyone else? Anyone else want to take a stab at it . . . no prizes, just interesting. __________________ 1960: ♥ '61 Rekord PII 1.7 3S 3.9 ♥ '69 Kadett LS 'sprint' 1.9 3A 3.18 1970: ♥ '70 GT 1.9 4S 3.44 ♥ '72 GT 2.2SSD 5S 3.44 ♥ '72 GT 2.4FI 5S 3.44P ♥ '73 GT 1.9FI 4S 3.44 ♥ '75 1900 1.9FI 4S 3.44 1980: ♥ '85 Bitter SC 3.9FI 5S 3.44P 2000: ♥ '09 Solstice GXP Coupe 2.0 SIDI VVT Turbo 5S 3.73P

01-24-2005	#4 (permalink)
tekenaar Cunning Linguist Join Date: Mar 2002 Location: Plano, TX 75074 Posts: 4,441 Real Name: Otto Provided Answers: 13	The answer . . . Opel changed their ignition coil + wiring from full switched 12V source at all times in '68 to full switched 12V during start only (direct connect, second wire from starter solenoid) and resistance wire connection (~9V) at all other times (ignition on/run mode) in '69 . . . at least according to published wiring diagrams. That means that they used an internal resistance coil, like the Bosch "blue" coil and most aftermarket replacement coils, in the cars prior to the '69 models and non-resistance coils from then forward. Anyone have a '68 or earlier model that can verify this . . . 2 wires (black/clear) on coil + connector? __________________ 1960: ♥ '61 Rekord PII 1.7 3S 3.9 ♥ '69 Kadett LS 'sprint' 1.9 3A 3.18 1970: ♥ '70 GT 1.9 4S 3.44 ♥ '72 GT 2.2SSD 5S 3.44 ♥ '72 GT 2.4FI 5S 3.44P ♥ '73 GT 1.9FI 4S 3.44 ♥ '75 1900 1.9FI 4S 3.44 1980: ♥ '85 Bitter SC 3.9FI 5S 3.44P 2000: ♥ '09 Solstice GXP Coupe 2.0 SIDI VVT Turbo 5S 3.73P

01-24-2005	#5 (permalink)
oldopelguy Have Opel, Will Travel Join Date: Mar 2002 Location: Saint Michael, MN Posts: 1,727 Logbook Entries: 3 Provided Answers: 2	yup Both my '67's, the Kadett and the Admiral are wired without the resistor wire, full 12V to the coil. Can't vouch for the GT's, but probably the same deal. __________________ 1958 Rekord Sedan, 1958 Olympia Wagon, 1959 Opel Olympia Sedan, 1967 Kadett Coupe, 1967 Admiral Sedan 4L CIH-6, 1968 Kadett fastback 1.1L, 1970 Kadett Wagon Turbo 2.2L, 1971 Kadett Sedan 1.1L, 1975 Manta Wagon 4.3L V-6

01-24-2005	#7 (permalink)
First opel 1981 Uber Genius Join Date: Apr 2003 Location: Portland, Oregon Posts: 780 Provided Answers: 6	Heh, heh, I knew the answer I found out the hard way when I was poor and swapping parts from car to car. My 69 was an early model and didn't have the resistor installed. So when I took the coil out of a wrecked Gt and put it into mine I had this stupid littel thing that pissed me off. I would start and drive fine, then al of a sudden the car would die. Turns out I needed a ballast resistor installed. Worked perfect after that. __________________ Opel GTs are not GM products

01-23-2005	#2 (permalink)
nobody No Access Join Date: Nov 2003 Location: in transit Posts: 3,873 Provided Answers: 1	well if I were to take a guess in 68 a GT was 1.9 0nly but 69 had the 1.1 available so the starter wiring is on the other side and uses different wires? BTW delivery was confimed, Thanks Otto.

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