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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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 Posted: Tue Dec 01, 2020 6:43 am Post subject: Puzzler....... for you to help me solve.......SOLVED!!! |
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History
this spring
removed engine
rear main seal
clutch
oil pan gasket
A/C removal pump
summer
head gasket blew and replaced with valve guides,valve cover gasket and valve clearance reset
new battery and rebuilt known good alternator along with new alternator mounting bushings.
Symptom.
charging at 12.6 at idle voltmeter on battery and on gauge in car.
with all accessories on it dips to 11.4 (heater fan, rear window fog, LED headlights and fog). turn signals make it really dip.
Engine temp gauge climbs quickly while the charging is at 12.6v-11.4v but the fans do not turn on. pegs out at HOT
oil pressure is Normal in all instances on gauge. It charged normally before I started the clutch/head gasket. It would charge intermittenly with normal temp setting. (the reason to check Alt and Battery Issue)
I've checked the connection to the temp sensor on back of head and it is connected.
driver fan worked when jumped at radiator fan switch albeit noisy at start.
Passenger side worked quietly with battery jump
open circuit on radiator fan switch when cold.
fans did not come on when i turned on the A/C. (normally do)
Please ask questions for more clues.
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI
Last edited by Schwami on Sat Dec 19, 2020 5:06 am; edited 1 time in total |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Tue Dec 01, 2020 8:39 am Post subject: |
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Battery+ (Back of alt), both fans +, radiator heat switch, ground..
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80 Turbo - Slightly Modified |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Wed Dec 02, 2020 1:48 am Post subject: |
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| Fasteddie313 wrote: | | Battery+ (Back of alt), both fans +, radiator heat switch, ground.. |
I don't understand your suggestion....
I'm going to pull my starter/alt/battery cable and inspect.
thanks
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Wed Dec 02, 2020 5:34 am Post subject: |
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| Schwami wrote: | | Fasteddie313 wrote: | | Battery+ (Back of alt), both fans +, radiator heat switch, ground.. |
I don't understand your suggestion....
I'm going to pull my starter/alt/battery cable and inspect.
thanks |
checked the connections
the car was running so I checked the voltage at the Alt 14.1 but at the battery 12.2
where is this issue.......?
fans turned on with AC switch
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Wed Dec 02, 2020 6:55 am Post subject: |
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What is the condition of the ground wire from the alternator to the block?
What is the condition of the ground wire from the body to the block?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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MikeJinCO
Joined: 08 Jun 2010
Posts: 1245
Location: Maysville, Colorado
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| Posted: Wed Dec 02, 2020 10:08 am Post subject: |
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First clean the grounds as Paul said. The cable connection ends have been know to get internal corrosion which you can't see, both positive and ground leads. Try running a booster cable jumper from the starter to battery and also from alternator to battery. Then do same on ground side.
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Mike
'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild) |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Thu Dec 03, 2020 4:59 am Post subject: |
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| Paul wrote: | What is the condition of the ground wire from the alternator to the block?
I replaced this cable with a new cable a few years ago and I have no reason to believe it to be bad. I am going check it again because of OCD
What is the condition of the ground wire from the body to the block? |
while I replaced the above cable. I added an extra grounding cable from Engine to Body.
I'm going to put in a replacement battery to body.
OCD
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Thu Dec 03, 2020 10:07 am Post subject: |
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| Schwami wrote: | | Fasteddie313 wrote: | | Battery+ (Back of alt), both fans +, radiator heat switch, ground.. |
I don't understand your suggestion....
I'm going to pull my starter/alt/battery cable and inspect.
thanks |
Wiring to skip the body electronics and just make it work and actually work..
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80 Turbo - Slightly Modified |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Thu Dec 03, 2020 12:03 pm Post subject: |
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| Fasteddie313 wrote: | | Schwami wrote: | | Fasteddie313 wrote: | | Battery+ (Back of alt), both fans +, radiator heat switch, ground.. |
I don't understand your suggestion....
I'm going to pull my starter/alt/battery cable and inspect.
thanks |
Wiring to skip the body electronics and just make it work and actually work.. |
Rig it? Engineer it? lol 😆 for educational purposes....
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Fri Dec 04, 2020 4:23 pm Post subject: |
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| Schwami wrote: | | Fasteddie313 wrote: | | Schwami wrote: | | Fasteddie313 wrote: | | Battery+ (Back of alt), both fans +, radiator heat switch, ground.. |
I don't understand your suggestion....
I'm going to pull my starter/alt/battery cable and inspect.
thanks |
Wiring to skip the body electronics and just make it work and actually work.. |
Rig it? Engineer it? lol 😆 for educational purposes.... |
I pulled off the harness and inspected it. Other than a few repairs from P.O. I put shrink tubing on the breaks and put on new connectors. Reinstall should be in the morning.
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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D Hook
Joined: 02 Nov 2002
Posts: 3158
Location: Omaha, NE
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| Posted: Fri Dec 04, 2020 9:16 pm Post subject: |
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[quote="Schwami"][quote="Fasteddie313"] | Schwami wrote: | | Fasteddie313 wrote: | | Battery+ (Back of alt), both fans +, radiator heat switch, ground.. |
Rig it? Engineer it? lol 😆 for educational purposes.... |
It's only temporary.....unless it works. 
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'80 924 n/a SOLD |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Wed Dec 09, 2020 5:43 am Post subject: |
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[quote="D Hook"][quote="Schwami"] | Fasteddie313 wrote: | | Schwami wrote: | | Fasteddie313 wrote: | | Battery+ (Back of alt), both fans +, radiator heat switch, ground.. |
Rig it? Engineer it? lol 😆 for educational purposes.... |
It's only temporary.....unless it works. :D |
********************** It took a few days, but I took out the starter/Alt harness and checked all of the connections and the wires. replaced the ones that I suspected might not be in order. replaced it and road tested ...... started out great 13.3 on the gauge temp was great too and I rigged up a Mulitmeter in the windshield. All good. then I drove into my driveway and it went to 12.2 and temp gauge went to the max.
Back to square one.
I think Ill start it, wait for it to do it again and then start taking fuses out until I see something different.
still looking for other input..... thanks guys!
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Mon Dec 14, 2020 7:13 am Post subject: |
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changed out the ignition switch..... Great success!! so far... time will tell.
1 thing I will say is that when taking off the ignition switch housing is that when you heat up the plastic collar that holds it in with a hair dryer and massage it with a bit of nut blaster, a vice grip will wiggle it off..... easy peasy.
Rig it? Engineer it? lol 😆 for educational purposes....[/quote]
It's only temporary.....unless it works. :D[/quote]
********************** It took a few days, but I took out the starter/Alt harness and checked all of the connections and the wires. replaced the ones that I suspected might not be in order. replaced it and road tested ...... started out great 13.3 on the gauge temp was great too and I rigged up a Mulitmeter in the windshield. All good. then I drove into my driveway and it went to 12.2 and temp gauge went to the max.
Back to square one.
I think Ill start it, wait for it to do it again and then start taking fuses out until I see something different.
still looking for other input..... thanks guys![/quote]
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Tue Dec 15, 2020 4:46 am Post subject: |
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Nope..... tried it this morning..... square one again..... ugh
| Schwami wrote: | changed out the ignition switch..... Great success!! so far... time will tell.
1 thing I will say is that when taking off the ignition switch housing is that when you heat up the plastic collar that holds it in with a hair dryer and massage it with a bit of nut blaster, a vice grip will wiggle it off..... easy peasy.
Rig it? Engineer it? lol 😆 for educational purposes.... |
It's only temporary.....unless it works. :D[/quote]
********************** It took a few days, but I took out the starter/Alt harness and checked all of the connections and the wires. replaced the ones that I suspected might not be in order. replaced it and road tested ...... started out great 13.3 on the gauge temp was great too and I rigged up a Mulitmeter in the windshield. All good. then I drove into my driveway and it went to 12.2 and temp gauge went to the max.
Back to square one.
I think Ill start it, wait for it to do it again and then start taking fuses out until I see something different.
still looking for other input..... thanks guys![/quote][/quote]
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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Schwami
Joined: 11 Apr 2016
Posts: 85
Location: Wisconsin Green Bay
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| Posted: Thu Dec 17, 2020 5:31 am Post subject: FERTIG! ERD ERD ERD!!!!! alles Prufen |
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It's the grounding wires. changed the -Battery cable to body. no change. then added a cable from Bat to body hook up directly to the Valve cover bolts.
Great SUCCESS!! 14.2v everywhere!
with the stereo, heater fan, headlights, Foglights and rear defrost I had 13.5v very acceptable.
I think that the body to engine ground location is a weak point.
Happy motoring!!! :wink:
_________________
1979 924 Diamant Zweischicht.
Serial # 9249201031
XG 309 543 engine code.
2012 Golf Sportwagon TDI |
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