Re: Hydraulic stop light switch
Posted by HH56 On 2019/6/23 15:04:46
For 54 believe the switch is on the brass block at the end of the power brake unit.
Brake lights are powered from the aux circuit breaker on the back of the instrument cluster and goes via the main loom into the engine comp and to a section which drops down and eventually gets to the brake switch. Can't remember but there may be wires for other things in that section. Out of the brake switch and then back to the dash where it enters a round black plug with 6 wires connecting to wires coming out of the steering column.
Power from CB to the brake light switch is an orange wire and signal out of the switch is a green wire which enters the round plug. The plug connects to the turn signal switch and once brake signal gets thru the switch where the signal is split into separate feeds for the bulbs goes back out the plug to an inline connector where it connects to the body loom going to the trunk. The right bulb is a yellow wire and left bulb is a brown wire.
The brake switch is where I would check first but if it is OK the next most likely spot is a bad connection at the plug or poor contact in the turn signal switch. The brake light signal goes to two spots in the switch -- one separate contact for each bulb so unlikely both contacts would be bad to have no brake lights at all.
Here is the turn signal circuit showing also the the brake light part where the switch connects the single green wire to both bulbs.
Attach file:
(232.83 KB)
Brake lights are powered from the aux circuit breaker on the back of the instrument cluster and goes via the main loom into the engine comp and to a section which drops down and eventually gets to the brake switch. Can't remember but there may be wires for other things in that section. Out of the brake switch and then back to the dash where it enters a round black plug with 6 wires connecting to wires coming out of the steering column.
Power from CB to the brake light switch is an orange wire and signal out of the switch is a green wire which enters the round plug. The plug connects to the turn signal switch and once brake signal gets thru the switch where the signal is split into separate feeds for the bulbs goes back out the plug to an inline connector where it connects to the body loom going to the trunk. The right bulb is a yellow wire and left bulb is a brown wire.
The brake switch is where I would check first but if it is OK the next most likely spot is a bad connection at the plug or poor contact in the turn signal switch. The brake light signal goes to two spots in the switch -- one separate contact for each bulb so unlikely both contacts would be bad to have no brake lights at all.
Here is the turn signal circuit showing also the the brake light part where the switch connects the single green wire to both bulbs.
Attach file:
(232.83 KB)
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