[39 OLDROD]

I know I am not the only one to have this problem SO what is wrong when your cruise control works fine EXCEPT the brake don't cut it of like it is supposed to . Yes I DID run the hot wire to the hot side of the brake switch and the ground to the wire that had no fire until I pushed the peddle I did all the self test on the thing and the light blinked just like the dir. said. well the up side is I was on a back road and tried it BEFORE I needed to stop so I just cut it of OH when I said it worked fine I DO mean all the others thangs are working,set,coast,resume ETC.

thanks OLDROD

[evolvo]

Well assuming the brake light switch is correctly adjusted so the circuit is complete with light pedal pressure it sounds like it might be an issue with the control unit. Have you called the tech line?

[Joe G]

X2 on calling the tech support line. If you are 200% sure that everything is wired correctly, you might as well figure on sending the unit back for a warranty exchange.

Originally Posted by 39 OLDROD

....Yes I DID run the hot wire to the hot side of the brake switch and the ground to the wire that had no fire until I pushed the peddle....

When you say 'ground' you mean 'brake cold' right?

Are we talking about a Rostra Global Cruise?

The function of the 'brake cold' wire is to provide a path to ground (through the brake lamp filaments) for the electromagnet in the servo that 'picks up' the throttle cable. The theory is that when you step on the brakes and engage the brake lamps, the path to ground for the 'brake cold' wire disappears, which causes the electromagnet to release the throttle cable. This is supposed to be a fail-safe system that works even if the electronics go haywire.

If you are totally sure about your wiring, you might want to double check that the factory didn't cross-up some wires in the pre-wired plugs - not likely, but possible.

I've installed dozens of these universal cruise control systems and haven't seen this particular problem yet. Guess you're just lucky..

Hope this helps....

[39 OLDROD]

Originally Posted by Joe G

X2 on calling the tech support line. If you are 200% sure that everything is wired correctly, you might as well figure on sending the unit back for a warranty exchange.



When you say 'ground' you mean 'brake cold' right?

Are we talking about a Rostra Global Cruise?

The function of the 'brake cold' wire is to provide a path to ground (through the brake lamp filaments) for the electromagnet in the servo that 'picks up' the throttle cable. The theory is that when you step on the brakes and engage the brake lamps, the path to ground for the 'brake cold' wire disappears, which causes the electromagnet to release the throttle cable. This is supposed to be a fail-safe system that works even if the electronics go haywire.

If you are totally sure about your wiring, you might want to double check that the factory didn't cross-up some wires in the pre-wired plugs - not likely, but possible.

I've installed dozens of these universal cruise control systems and haven't seen this particular problem yet. Guess you're just lucky..

Hope this helps....

YES,YES AND YES I guess if some company makes a bad unit i'll get it . I will check every thing one more time and IF I get my sign one more time I will call tech. Oh you have installed several I don't suppose a dip switch would cause the problem?

OLDROD

PS will it even work if wired backward?

[Joe G]

Originally Posted by 39 OLDROD

....I don't suppose a dip switch would cause the problem?

Unfortunately, DIP switch settings can't cause the problem you are having.

Originally Posted by 39 OLDROD

PS will it even work if wired backward?

I had one that had the tach wire and the vss wire reversed in the main servo plug - when you hit 'set' it would either not respond at all, or take off like a Toyota.

In your case, I was thinking that the cruise may work with the ground and the brake cold wires reversed, until you hit the brake, then it might freeze but not release. Probably not likely though.

Good luck....

[cboy]

I once had this happen with the Audiovox (Rostra type) unit in my '32. Scared the bejezus out of me. Turned out it was a loose connection at the brake switch itself...had those slip on type bullet connectors. Sounds like you have already tested this but just to make sure, put a meter on your brake switch and make sure it is operating up to snuff and that full current is flowing (or not flowing) at the proper times when you depress the pedal.

Are the brake lights working when you hit the pedal?

[39 OLDROD]

Originally Posted by cboy

I once had this happen with the Audiovox (Rostra type) unit in my '32. Scared the bejezus out of me. Turned out it was a loose connection at the brake switch itself...had those slip on type bullet connectors. Sounds like you have already tested this but just to make sure, put a meter on your brake switch and make sure it is operating up to snuff and that full current is flowing (or not flowing) at the proper times when you depress the pedal.

Are the brake lights working when you hit the pedal?

It was the last I CHECKED and yea I KIND OF KNOW that feeling I had 12 volts on the cold side the last time I checked. I did call tech late this afternoon and did't get the sharpest tack in the box SO I'LL check once more just as soon as it cools of a bit . hot as blazes here rite now and I had several customers today so did't even think about going back in the shop as it was about 120 with the BIG BOX FAN ON.

OLDROD

[39 OLDROD]

Originally Posted by Joe G

Unfortunately, DIP switch settings can't cause the problem you are having.


I had one that had the tach wire and the vss wire reversed in the main servo plug - when you hit 'set' it would either not respond at all, or take off like a Toyota.

In your case, I was thinking that the cruise may work with the ground and the brake cold wires reversed, until you hit the brake, then it might freeze but not release. Probably not likely though.

Good luck....

Felt more like it speeded up when I HIT THE BRAKE probably my imagination sure as heck did't slow down. to hot here to mess with the thing today. Oh yea I did call tech a waist of time all he knew was to read the book heck I had all ready done that nothing about my problem and he did't have a clue.
I'LL check the wires to make sure my brother did't do that as he like to run the crimpers and has a little color problem.
OLDROD

[Irelands child]

If you have LED brake lights and either don't have a resistor or that goofy relay arrangement they show you on the bottom of the first page of the IB, the cruise wont shut off when you apply the brakes.

Dave W

[39 OLDROD]

Originally Posted by Irelands child

If you have LED brake lights and either don't have a resistor or that goofy relay arrangement they show you on the bottom of the first page of the IB, the cruise wont shut off when you apply the brakes.

Dave W

Dave I don't think the lights are LED as we did try a set of LED tail lights on my brothers 33 VICKY and they did not burn at all. They (mine)work fine on brake,turn and park. With my luck the unit will be bad. I think I get all the junk stuff Oh are you doing any cruising?now that you are legit.

OLDROD

[Irelands child]

Originally Posted by 39 OLDROD

Dave I don't think the lights are LED as we did try a set of LED tail lights on my brothers 33 VICKY and they did not burn at all. They (mine)work fine on brake,turn and park. With my luck the unit will be bad. I think I get all the junk stuff Oh are you doing any cruising?now that you are legit.

OLDROD

OK - it was a shot at something you might have overlooked.

I've gone out for a few rides but right now it's jacked up in my shop getting a few 'punch list' things done to it, plus we've been away. And the heat and high humidity here has been outta sight

Dave W

[cboy]

Originally Posted by Irelands child

If you have LED brake lights and either don't have a resistor or that goofy relay arrangement they show you on the bottom of the first page of the IB, the cruise wont shut off when you apply the brakes.

From my limited experience, LEDs cause just the opposite problem. The cruise control will not stay engaged when you set it. My understanding is the cruise is dependent on the resistance of the brake light bulbs in order to engage...and there is almost no resistance in an LED.

At least that is what happened when I switched my '32 over to LEDs and my Audiovox stopped working. As soon as I hooked a couple incandescent bulbs into the wiring (and hid them up under the frame), everything worked fine again.

[Irelands child]

Originally Posted by cboy

From my limited experience, LEDs cause just the opposite problem. The cruise control will not stay engaged when you set it. My understanding is the cruise is dependent on the resistance of the brake light bulbs in order to engage...and there is almost no resistance in an LED.

At least that is what happened when I switched my '32 over to LEDs and my Audiovox stopped working. As soon as I hooked a couple incandescent bulbs into the wiring (and hid them up under the frame), everything worked fine again.

That's not the way the aftermarket Rostra (Dakta Digita/Flaming River are Rostra) works.

[Joe G]

Originally Posted by cboy

From my limited experience, LEDs cause just the opposite problem. The cruise control will not stay engaged when you set it. My understanding is the cruise is dependent on the resistance of the brake light bulbs in order to engage...and there is almost no resistance in an LED.

At least that is what happened when I switched my '32 over to LEDs and my Audiovox stopped working. As soon as I hooked a couple incandescent bulbs into the wiring (and hid them up under the frame), everything worked fine again.

That's been my experience as well, except that instead of wiring in incandescent bulbs, I wired in a relay (per Rostra's instructions) that grounds the 'brake cold' wire unless the brake lights are activated. The 'brake cold' wire needs a low resistance path to ground to engage, such as a brake lamp would provide, but LEDs can't.

[39 OLDROD]

Originally Posted by Irelands child

That's not the way the aftermarket Rostra (Dakta Digita/Flaming River are Rostra) works.

My cruise control is a DAKOTA DIGITAL and like I said in a earlier post EVERY thing worked but the cut of when I taped the brake peddle and like Dave said IT IS HOT as blazes here with humidly in the 75 to 80 range SO I HAVE keep my self up in the show room or office this week all but for one cruise to town and back. Maby it's cool of a little next week but if someone comes up with a idea just let me know. at lest the of button works

OLDROD