ID this Solenoid?

[MPDano]

Can anyone positively ID this Solenoid. I think it's the Cruise Control Solenoid located in the Fender. Does it look like it?

It's from a 1979.

[MPDano]

I guess a picture would help, yes?

[Danglerb]

944 617 121 00

Looks like it in the parts diagram a little, but not in some. No idea.

[tisilrad]

is ther no part number under the bracket?

[rjm65]

Hey Leo,
Here's a pic ref my 79. Only thing this doesn't show is the actual wiring harness, everything sits in the fenderwell except for #11 (console underneath radio), and bracket #15 (sits under spider, throttle, cruise and bowden cable go through it).

Did they switch from a vacuum solenoid to electric solenoid on the cruise control along the way? That one you have looks electric and not vacuum.

[Normy]

Fetzer valve. Controls the flux gate on the transmitometer.

Anyway...I see a red wire, a black wire, and a control wire. If it is a solenoid as you say, then there must be some sort of mechanical connection too. What does that look like? One hypothesis that kind of fits the facts is that since your car is a "Euro", then it must have been "Federalized" [a nice term for molested~] at one point in time, and as you well know...."Federalizers" were a rather creative group. Maybe something for pollution control?

N

[MPDano]

No worries guys. I asked the guy before I ended bidding and winning it and he gave me some short insignificant number. Although there was a paper tag on it that said 928 Starter Soleniod when i got it. I hate sellers that can't friggin read or write. It's basically a Flux Capacitor to me.

[DPW928]

It's an isolated starter solenoid like used on the older Fords. The red wire is from the ignition switch and the large black wire are a feed from the battery and power to the starter. They are now sold as replacements for defective starter mounted solenoids or as a separate power cutoff for security systems.

[MPDano]

Ok guys, I ended up getting a "real" Cruise control Solenoid for a steal. In rjm65's diagram, I don't see a mount of any kind. Anyone got a pic of it mounted with the fender off?

[DPW928]

Originally Posted by MPDano

Ok guys, I ended up getting a "real" Cruise control Solenoid for a steal. In rjm65's diagram, I don't see a mount of any kind. Anyone got a pic of it mounted with the fender off?

Page 27-8 of the WSM shows it mounted. It sits on a mount/plate and is secured with a nut that is attached to the threaded stud that is on the bottom of the solenoid.

[MPDano]

Originally Posted by DPW928

Page 27-8 of the WSM shows it mounted. It sits on a mount/plate and is secured with a nut that is attached to the threaded stud that is on the bottom of the solenoid.

Good to know this. I am wondering if there is already a mount in the fender already, but won't know till I remove the wheel well cover. Thanks DPW.

[MPDano]

Pic of the one I will be getting:

[MPDano]

I also found this write up on the Pirtle Pages. I thought I would share this valuable info

Cruise Control

The Automatic Cruise Control (Tempostat) often fails for several reasons. The electrical connection at the vacuum servo corrodes, the vacuum system leaks, or the control brain fails. The workshop manual includes a good troubleshooting procedure in section 27.

1. Check fuse #4 (S4). The same fuse runs the stoplights.
2. Test the vacuum to the reservoir by connecting a vacuum pump to the line running from the check valve (connected to the brake booster) into the fender. It will take quite a number of pumps to bring up the vacuum in the reservoir.
3. Remove the left front wheel and inner panel.
4. In the rear of the fender is the vacuum servo. Check that the electrical connection is clean and tight. The servo is removed by removing the bolt at the bottom. Also check the vacuum line for twists or kinks.
5. If everything checks out, replace the fender trim and wheel.
6. Remove the two side carpet panels of center console.
7. The control is a silver metal box mounted on top of the tunnel next to the firewall. Remove the bolt on the right side.
8. Remove the multiple pin plug.
9. The workshop manuals include a check of the servo by bridging terminals 3 and 5 on the plug. "Connect a push button switch on terminals 7 and 12. Turn on ignition and press the push button switch with engine stopped. The vacuum servo should move the throttle uniformly to full load position. This requires vacuum."
10. Check the switch controls with a volt/ohmmeter. Turn on ignition (do not start engine).
11. Connect the voltmeter between terminals 5 and 12 (ground). Terminal 5 should have battery voltage.
12. Connect the voltmeter between terminals 6 and 12. Terminal 6 should have voltage when the brake is pressed.
13. Connect terminals 8 and 12. There should be voltage. Pulling back on the cruise control lever (cancel) should go to 0 volts.
14. Terminals 9 and 12 should have 0 volts, but pushing the lever forward (set) should show voltage.
15. Terminals 10 and 12 should have 0 volts, and voltage when pushing the lever down (repeat).
16. An ohmmeter should read 0 ohm between terminal 12 and car ground.
17. Terminals 3 and 7 should read @ 14 ohms.
18. Terminals 11 and 12 should alternate from 0 to infinite ohms while turning one rear wheel and holding the other.
19. If everything checks out thus far, bend open the metal tabs of the control and pull the circuit board out.
20. Carefully use a soldering iron and heat each joint.
21. Replace the control making sure to correctly orient the multiple pin plug.
22. Hopefully your cruise control now works!

[lfausty]

oooww ooww im gonna like that, write-up whole cruisey sys hasnt even been looked at yet. Well im not driving with both hands over my eyes, just one, dah! how would i shift.

well thats a much prettier piece mp and..... it works bo nus.

[Alan in AZ]

Its an aftermarket high power 200A relay - it has nothing to do with a Porsche...

Alan

[MPDano]

I ended up opening the cover on the left front wheel (behind the wheel) and found the the mount for the Solenoid is already built into the body. Wiring is even there and zipped tied. Spider Webs were on Option on these Euros.

[MPDano]

Installed all the pieces to the puzzle today and went for a test run and "nada." Is there a Fuse or Relay for the Cruise Control System as my chart shows nothing.

[MPDano]

[MPDano]

[MPDano]

Thought I would post the functions of the Cruise Control Lever for future use. Mine is in German so this helps me a lot.

1 Set/Accelerate
2 Reset
3 Cancel
A u t o m a t i c S p e e d C o n t r ol
The automatic speed control allows you to
maintain a constant cruising speed of 30 mph
(50 km/h) or higher, without actuating the
accelerator pedal. Any manual operation,
such as accelerating. Gearshifting or braking
can be done independent of the automatic
speed control. The spring loaded control
lever operating the automatic speed control
is located just below the wiper/washer lever.
CAUTION: While driving with the automatic
speed control set (at speeds above 30
mph or 50 km/h), do not bring shift lever
into the Neutral position to prevent excessive
engine rpm.
To operate the automatic speed control
- Accelerate to the desired cruising speed,
push lever toward instrument cluster
(arrow 1) and release. This sets the cruising
speed and stores it in a memory.
- After a second or two automatic speed
control will take over, and you can remove
your foot from the accelerator pedal, The
set cruising speed will be maintained automatically.
- Passing: when you want to drive faster
for a brief moment, for example when
passing another vehicle, actuate the accelerator.
When you take your foot off the
accelerator pedal, the preset speed will
automatically be resumed.
- Gearshifting: when shifting gears, the
automatic speed control is only disengaged
as long as the clutch pedal Is depressed.
The preset speed will be resumed as
soon as you take your foot off the clutch
pedal.
- Braking and stopping: whenever you
apply the brake or come to a stop, the
automatic speed control is disengaged,
Move the lever down (arrow 2). and the
preset speed will be resumed.
- Switching system off: to switch the automatic
speed control off. move the lover
toward you (arrow 3). To resume the proset
speed, move the lever down (arrow2).
To change the preset cruising speed
Increase preset speed:
- Accelerate by depressing the accelerator
pedal. When the desired speed is reached
move the lever up (arrow 1) and take the
foot off the accelerator pedal. Now the
new cruising speed is set and stored in the
memory.
- As an alternative, you can hold the lever
in the up position (arrow 1), without depressing
the accelerator pedal. The car
will accelerate on its own. When the dosired
speed is reached, release the lever.
Decrease preset speed:
- Apply the brake, which will disengago the
automatic speed control. When the vehicle
has slowed down to the desired
speed, move the lever up (arrow 1) to set
the new cruising speed.
- As an alternative, disengage the automatic
speed control by moving the lever toward
you (arrow 3). When the vehicle has
slowed down to the desired speed, move
the lever up (arrow 1) to register the new
cruising speed in the memory.
Note: When driving up a hill, if the engine
power is insufficient in a particular gear, the
speed control will bo disengaged automatically.
Shift to a lower gear to avoid lugging
the engine.
CAUTION: Do not use the automatic
speed control when driving on winding
or slippery roads,or in varying and dense
traffic.