[DeTomaso] No brake lights

[Doug Braun]

Konrad,

The pink wires are for lighting the "BRAKE" fluid pressure imbalance warning light on your dash so they're not the culprit for your brake lights not working.

But the wires that go to the brake pressure switch under the brake booster can be the cause of this.
On the later cars one wire to this switch is RED and the other is a RED/BLACK tied to a GRAY wire on a common connector.
On the earlier cars the GRAY wire isn't present since this one goes to the later car's Emergency Interlock box under the dash.

A common problem is for this Brake light switch, which works on brake fluid pressure, to fail.  You can test this by shorting its 2 wires together while someone else presses the brake pedal, while someone else looks at the brake lights (requires 3 people! Or 2 people and a mirror to watch the lights).

Doug Braun
Blue 73L #5505
 

-----Original Message-----
From: DeTomaso On Behalf Of Konrad Szwab
Sent: Wednesday, November 24, 2021 5:09 PM
To: detomaso at server.detomasolist.com
Subject: [DeTomaso] No brake lights

So I drove my car home (thank you all for the great suggestions and parts links), there is a large message with some pics awaiting moderation.

Ran great, but I have no brake lights. There seems to be a broken spade connector in the front trunk that has two pink wires and a white (and black I think) wire disconnected.

I am planning to trace some wiring tomorrow from the pressure switch near by the brake balancing valve.

Could that disconnected wire cause the no brake lights condition ?

Thanks,

Konrad