Where can I get a brake light switch relay?
Adding a relay to the brake light circuit will remove the heavy current from the brake light switch. The relay to use is a general purpose 30 Amp automotive relay, sometimes known as a Bosch relay. They are available from Radio Shack and most auto parts stores. The relay can be mounted anywhere that is convenient.
Where are the brake lights on my car?
You will get the fuse panel under the dashboard and the PDC under the hood. The brake light switch is also to be found under the dashboard and check if its plunger touches the brake pedal arm. Any problem with the fuse box and light switch will affect the brake lights.
Where to mount a brake light relay on a MGAs?
I mounted mine close to the original brake light switch, but it can just as well be mounted in the trunk (for the MGAs or MGBs), close to one of the tail light/brake light assemblies (if you do this, you will need to bring a source of 12 volts, other than the 12 volts that is switched by the brake light switch, back to where the relay is mounted).
How does a diode work on a brake light relay?
The diode can be soldered across terminals 85 and 86 of the relay. The advantage of the capacitor is that the capacitor acts as an arc suppressor and the diode collapses the field of the relay coil, eliminating any inductive surge across the brake light switch when it opens.
Adding a relay to the brake light circuit will remove the heavy current from the brake light switch. The relay to use is a general purpose 30 Amp automotive relay, sometimes known as a Bosch relay. They are available from Radio Shack and most auto parts stores. The relay can be mounted anywhere that is convenient.
I mounted mine close to the original brake light switch, but it can just as well be mounted in the trunk (for the MGAs or MGBs), close to one of the tail light/brake light assemblies (if you do this, you will need to bring a source of 12 volts, other than the 12 volts that is switched by the brake light switch, back to where the relay is mounted).
The diode can be soldered across terminals 85 and 86 of the relay. The advantage of the capacitor is that the capacitor acts as an arc suppressor and the diode collapses the field of the relay coil, eliminating any inductive surge across the brake light switch when it opens.
What kind of capacitor does a brake light switch need?
In the accompanying diagrams, I show a 0.47 microfarad capacitor across the contacts of the brake light switch and a diode across the coil of the relay. These are optional parts and can be left out if you wish. I added them as additional protection for the brake light switch. The capacitor is just soldered across the switch terminals.
Where is the relay on a Harley Davidson?
A relay is an electronic switch triggered by the front or rear brake light switch, which sends power directly from the battery to the brake light bulb. The relay is located in the fuse box behind the left side saddlebag. Harley suggests testing the relay circuit with a digital multimeter,…
Where is the brake light on a Harley Davidson?
The problem is usually found in the right handlebar switch housing where the front brake switch is located. Actuation of the switch is accomplished by the interplay between the brake lever/master cylinder assembly and the light switch.
How does a make and break relay work?
The most common make and break relays are produced to switch a single feed line (usually positive) to power a section of a circuit, the relay is switched manually via a toggle/push switch or remotely through the circuit.
How to replace the brake light switch on your car?
How to Replace a Brake Light Switch. Step 1 – Find the Brake Light Switch. The brake light switch is often found in the same location on all vehicles. You will need to open the driver’s Step 2 – Access the Brake Light Switch. Step 3 – Remove the Brake Light Switch. Step 4 – Replace the Brake …
How to replace an anti lock brake fuse or relay?
Line up the replacement anti-lock brake fuse or relay with the recess that the old one came out of. Gently set it in place and push down until it stops. The base should be flush with the fuse box deck and be approximately the same height as the fuses or relays around it. Step 7: Reinstall the underhood fuse/relay box cover.
How to Replace a Brake Light Switch. Step 1 – Find the Brake Light Switch. The brake light switch is often found in the same location on all vehicles. You will need to open the driver’s Step 2 – Access the Brake Light Switch. Step 3 – Remove the Brake Light Switch. Step 4 – Replace the Brake
Where is the relay valve on an air brake?
The relay valve in an air brake system functions as a relay station to speed up the application and release of the brakes. The valve is normally mounted at the rear of the vehicle in proximity to the chambers it serves.
When to replace brake switch and cruise control switch?
I replace both the brake switch and the cruise control switch on the brake pedal since my push button start is now intermittent, the cause of this intermittent issue is that the car control unit thinks that the brake is not being depressed so it will not issue a start sequence. Replacing the worn out brake switch fixed this problem.