Cruise Control Basics (lesson request)

[BigBrother-84]

I know you didn't ask that question of me, but I'll answer nonetheless as I've just had a realization.

Gary, as usual, you answered before I asked!

That explains very well the differences between E2TZ, E3TZ and E4TZ.

Talking about this latter, I just received a NOS E4TZ-9A818-A.

Here are pictures of the unboxing. I'll send you the scanned installation brochure and other documents (PDF), so you'll be able to add them to the Library.

First, here is the E4ZZ-9A819-A - Manual Transmission Clutch Switch, which has to be purchased separately:

And the Dealer Installed Kit (E4TZ-9A818-A):

1- Unboxing:

2- Packing List:

3- Installation Guide (will send you the full 16 pages scanned PDF):

4- Mirror-clipped Instructions (do I have to leave it there??)

5- Electronic Module:

6- Servo & Vacuum:

:

7- Control-switch Lever (Ford updated the 1984 package to enable 1986 installation).

I am wondering why there are a Low Beam and a Horn symbols on the lever, on the "Mirror-clipped" instructions... The lever in the box has only the Low-Beam one. And what is it for, anything to see with the floor Low-high Beam switch?

8- Harness:

9- Speed Sensor:

10- Brake pedal switch and other brackets :

[Gary Lewis]

I know you didn't ask that question of me, but I'll answer nonetheless as I've just had a realization.

Gary, as usual, you answered before I asked!

That explains very well the differences between E2TZ, E3TZ and E4TZ.

Talking about this latter, I just received a NOS E4TZ-9A818-A.

Here are pictures of the unboxing. I'll send you the scanned installation brochure and other documents (PDF), so you'll be able to add them to the Library.

First, here is the E4ZZ-9A819-A - Manual Transmission Clutch Switch, which has to be purchased separately:

And the Dealer Installed Kit (E4TZ-9A818-A):

1- Unboxing:

2- Packing List:

3- Installation Guide (will send you the full 16 pages scanned PDF):

4- Mirror-clipped Instructions (do I have to leave it there??)

5- Electronic Module:

6- Servo & Vacuum:

:

7- Control-switch Lever (Ford updated the 1984 package to enable 1986 installation).

I am wondering why there are a Low Beam and a Horn symbols on the lever, on the "Mirror-clipped" instructions... The lever in the box has only the Low-Beam one. And what is it for, anything to see with the floor Low-high Beam switch?

8- Harness:

9- Speed Sensor:

10- Brake pedal switch and other brackets :

Wow! Good explanation and pictures of what is in the kit. And I got your scanned documents so will put them on the site soon. (Maybe not tomorrow as I'm told I'm getting a year older then and I think a set of fender flares is begging to be installed.)

As for the tag, won't it be kind of dangerous with it blocking your vision? I'd think Ford wouldn't want you to have it there for fear of them being complicit in an accident.

[BigBrother-84]

As for the tag, won't it be kind of dangerous with it blocking your vision? I'd think Ford wouldn't want you to have it there for fear of them being complicit in an accident.

[BigBrother-84]

[...] Maybe not tomorrow as I'm told I'm getting a year older

Happy Birthday Gary!

and I think a set of fender flares is begging to be installed.

That's a nice Birthday Gift!

 

[Gary Lewis]

[...] Maybe not tomorrow as I'm told I'm getting a year older

Happy Birthday Gary!

and I think a set of fender flares is begging to be installed.

That's a nice Birthday Gift!

Thanks! Yes, it IS a good birthday gift. I'll post pictures here when I get them installed.

[fords4life]

I know you didn't ask that question of me, but I'll answer nonetheless as I've just had a realization.

Gary, as usual, you answered before I asked!

That explains very well the differences between E2TZ, E3TZ and E4TZ.

Talking about this latter, I just received a NOS E4TZ-9A818-A.

Here are pictures of the unboxing. I'll send you the scanned installation brochure and other documents (PDF), so you'll be able to add them to the Library.

First, here is the E4ZZ-9A819-A - Manual Transmission Clutch Switch, which has to be purchased separately:

And the Dealer Installed Kit (E4TZ-9A818-A):

1- Unboxing:

2- Packing List:

3- Installation Guide (will send you the full 16 pages scanned PDF):

4- Mirror-clipped Instructions (do I have to leave it there??)

5- Electronic Module:

6- Servo & Vacuum:

:

7- Control-switch Lever (Ford updated the 1984 package to enable 1986 installation).

I am wondering why there are a Low Beam and a Horn symbols on the lever, on the "Mirror-clipped" instructions... The lever in the box has only the Low-Beam one. And what is it for, anything to see with the floor Low-high Beam switch?

8- Harness:

9- Speed Sensor:

10- Brake pedal switch and other brackets :

Great work and beat me to the punch. This is exactly what I have minus the parts that weren't in the original package I received. The one thing I haven't figured out and they don't picture very well is where to mount the controller. I'm planning somewhere under the middle of the dash. I might even use some double sided foam tape and mount it directly to the EEC housing.

[BigBrother-84]

The one thing I haven't figured out and they don't picture very well is where to mount the controller. I'm planning somewhere under the middle of the dash. I might even use some double sided foam tape and mount it directly to the EEC housing.

I agree, not very clear. They seem suggesting to attach (hang up) the control module to the main dash harness.

[BigBrother-84]

The one thing I haven't figured out and they don't picture very well is where to mount the controller. I'm planning somewhere under the middle of the dash. I might even use some double sided foam tape and mount it directly to the EEC housing.

I agree, not very clear. They seem suggesting to attach (hang up) the control module to the main dash harness.

CLUTCH SWITCH CONCERNS:

I am wondering about the clutch switch action.

From the SC Dealer Installed Kit instructions:

From the Clutch Switch instructions:

Automatic transmission:

When brake pedal is depressed, the speed control module receives a signal from the brake light switch (Speed Control will disengage) and the vacuum pedal switch releases the servo.

Manual transmission:

• Clutch Pedal depressed:

Same as AT, when brake pedal is depressed, the Speed Control Module receives a signal from the brake light switch (Speed Control will disengage) and the vacuum pedal switch releases the servo.

• Clutch pedal untouched (up):

The Clutch Switch cuts the brake light signal (circuit opened), so the Speed Control Module will NOT receive the brake signal if the brake pedal is depressed–which isn't a good idea while not depressing the clutch pedal, let's say.

Although the brake pedal will still cut the vacuum action.

I don't see how depressing the clutch itself is supposed to disengage the Speed Control (without touching the brake pedal)...

Any thoughts?

 

[Gary Lewis]

CLUTCH SWITCH CONCERNS:

I am wondering about the clutch switch action.

From the SC Dealer Installed Kit instructions:

From the Clutch Switch instructions:

Automatic transmission:

When brake pedal is depressed, the speed control module receives a signal from the brake light switch (Speed Control will disengage) and the vacuum pedal switch releases the servo.

Manual transmission:

• Clutch Pedal depressed:

Same as AT, when brake pedal is depressed, the Speed Control Module receives a signal from the brake light switch (Speed Control will disengage) and the vacuum pedal switch releases the servo.

• Clutch pedal untouched (up):

The Clutch Switch cuts the brake light signal (circuit opened), so the Speed Control Module will NOT receive the brake signal if the brake pedal is depressed–which isn't a good idea while not depressing the clutch pedal, let's say.

Although the brake pedal will still cut the vacuum action.

I don't see how depressing the clutch itself is supposed to disengage the Speed Control (without touching the brake pedal)...

Any thoughts?

Jeff - I'm confused as well. The schematic below, from the 1985 EVTM, shows how Ford did it.

Are the red letters saying "Circuit Opened If Clutch Pedal Released (Up)" yours or in the instructions. They appear to be exactly backwards.

If the switch closed when the clutch pedal is up, meaning the clutch is engaged, then the speed control system would "see" the brake lamp. So if they were to put a pull-up resistor on that wire the voltage would be showing 0V since the brake lamp has a very low resistance. Then if the clutch pedal is depressed the voltage would go up to 12V. Or if the brake pedal is depressed the voltage would also go to 12V.

[BigBrother-84]

Are the red letters saying "Circuit Opened If Clutch Pedal Released (Up)" yours or in the instructions.

The red text is mine. I tested the Clutch Switch and was surprised to discover that it is a "normal opened circuit" until the pedal is depressed. Then (clutch released, pedal to the floor), the switch closes the circuit, enabling a depressed Brake pedal to send 12V to the Brake Lights and, therefore to the Speed Control Module.