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Gotcha. Thanks for confirming that. I've been looking for one of those, but I've not had any luck finding one yet. If I don't find one soon, I'll probably make an adapter like I've read some other folks have done.
Well, I took the switch out of my 2001 and took it apart to get the switch assembly out of it and it's completely different. It's not a stand alone assembly, like the one's from earlier models, its integrated into the arm. I know I want the multi-switch body out of a 1981 Chevy/GMC van, or 1981-84 Chevy/GMC truck to bolt up to my steering column, but what year range of the internal switch do I need to swap into it?
You need a mid 80's to mid 90's lever to take the switch out of. Just make sure it has 4 wires, the older 3 wire switches look the same, but won't work right.
I can't remember if I updated that i got mine working. There's a wire with 12v and a wire with 0v. when you press the brake pedal it should alternate. 12v from the brake switch and 12v should go to zero. It's crude self test of the brake switch. Without seeing that the cruise module will not allow cruise to work. my issue was my led tail lights didn't pull the voltage to 0v when I hit the brake. So I added a resistor by the crusie module to load the circuit like real bulbs would. I think someone else had this issue also.
As far as switches go I didn't care for adapting the other turn signal switches and trying to add wiring into the older columns.
I mounted a small toggle switch on the dash. Normally centered and momentary on in both directions. One way is set and decel and the other is resume/accel. I basically removed the on/off switch. Which isn't necessary. Even if the brake switch failed. if you brake hard it'll disable itself. If it can't maintain the speed it shuts off.
Without seeing that the cruise module will not allow cruise to work. my issue was my led tail lights didn't pull the voltage to 0v when I hit the brake. So I added a resistor by the crusie module to load the circuit like real bulbs would.
Do you recall what size resistor you used for this?
LED taillights cause a lot of people headaches. What I usually use is a micro relay. Just need to hook up the 85 and 86 terminals since all you would be using it for is the load. Just tap into the cold side of the brake light switch under the dash, hook that side to 85 and ground the 86. The relay will click whenever the brakes are applied so you will know its working right, but you will never hear it in normal driving.
A relay would of worked also. Making the cruise work was an after thought. I put it all in and it didn't work every time. It would work sometimes. I had a junk yard cruise from a car with cable from a truck. Thought I had bad parts. Between pushing the brake and cranking sometimes it would see the crank voltage drop as a brake pedal press. You can buy a load resistor for tail lights at oreillys or Amazon. Oriellys stocked this part. I mounted it to the inner fender by the cruise module. They do get warm. So keep them away from other wiring, carpet and insulation.
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LED taillights cause a lot of people headaches. What I usually use is a micro relay. Just need to hook up the 85 and 86 terminals since all you would be using it for is the load. Just tap into the cold side of the brake light switch under the dash, hook that side to 85 and ground the 86.
So, just to confirm. Connect the relay (or the resistor, if so desired) like method A or method B in my images?
Just need to hook up the 85 and 86 terminals since all you would be using it for is the load. Just tap into the cold side of the brake light switch under the dash, hook that side to 85 and ground the 86.
Just to clarify. Would I wire the relay up like Method A or Method B below?
What I usually use is a micro relay. Just need to hook up the 85 and 86 terminals since all you would be using it for is the load. Just tap into the cold side of the brake light switch under the dash, hook that side to 85 and ground the 86.
Just to clarify. Do you wire your relay like method A or B? Method A Method B
I ended up making an adapter for the later model cruise and turn switch out of a small section of 1/4" ID brake line. I made it a loose press fit with a key slot for the key feature pressed into the switch arm. I fixed the washer lever in place with the same double thick adhesive filled heat shrink tube that manages the switch wire.
Just need to hook up the 85 and 86 terminals since all you would be using it for is the load. Just tap into the cold side of the brake light switch under the dash, hook that side to 85 and ground the 86.
I've been trying to post a follow-up with a couple of images to confirm how you hook up your micro relays, but they are still awaiting admin approval, so I'll try to ask with just words. I understand that terminal 85 connects to the non-battery + side of the normally off stop lamp switch (white wire). However, terminal 86 should go to a body ground and not to the battery + (orange) wire comming out of the normally off stop lamp switch, right?
I've been trying to post a follow-up with a couple of images to confirm how you hook up your micro relays, but they are still awaiting admin approval, so I'll try to ask with just words. I understand that terminal 85 connects to the non-battery + side of the normally off stop lamp switch (white wire). However, terminal 86 should go to a body ground and not to the battery + (orange) wire comming out of the normally off stop lamp switch, right?
Relays have the following terminals -
85 ground of the coil
86 positive of the coil
The coil operates the relay
30 power for the work
87 switched power from 30 when the coil in energized
87A power from 30 when the relay is at rest
If you ground both 85 and 86 the coil of the relay will not operate.
If you want a ground signal out of the relay you would ground 30 and 87 would go to the wire you want to ground.
Then when the relay coil is operated it would complete the ground circuit just as it would a power circuit.
I've been trying to post a follow-up with a couple of images to confirm how you hook up your micro relays, but they are still awaiting admin approval, so I'll try to ask with just words. I understand that terminal 85 connects to the non-battery + side of the normally off stop lamp switch (white wire). However, terminal 86 should go to a body ground and not to the battery + (orange) wire comming out of the normally off stop lamp switch, right?
Yes, that is correct. You only need one relay, 85 to the white wire on the brake switch, and 86 to any good ground location under the dash. When you step on the brake, and the brake lights come on, the relay should click, that way you know it's working.
02-13-2022, 12:12 PM
