Topic: What is a 4 wire turn signal indicator relay?

[kkupec02]

I have electrical issues that I am trying to figure out. I have confusion however. My problem is very similar to what is in picture 1 of my 1967 cougar, mustang, fairlane, falcon, mercury shop manual. That manual mentions fix could be 4 wire turn signal indicator relay. According to the wiring diagrams, I haven't gotten behind dash panel yet, there is a turn signal flasher and an emergency flasher. Picture 2 shows what is being sold for both applications today. They are not 4 wire though unless you add them together. Further confusion are pictures 3 and 4 showing original EBay flashers which have more than 2 wires, but not 4. What is service manual referring to regarding 4 wire turn signal indicator relay?

[67gta289]

Keep in mind that a relay is not a flasher, and vice versa.

Regular old 67-68 Mustangs use (1) a 2-wire flasher for turn signals, (2) a separate 2-wire flasher for emergency flashers, but (3) no relay.

The only relays used on regular Mustangs are for the optional seat belt warning light (which is a "time out" relay), the optional low fuel warning light, and the optional tilt-away steering column.

I don't have a wiring diagram specific to the Shelby or the Cougar though.

[196667Bob]

In looking at the Shop Manual, the statements noting "4-Wire Relay"  appear to be only for the Cougars, which used a 4 Wire Relay for the Sequential Turn Signals. So, unless you have a Cougar, ignore this. The only Relays used on 67 Mustangs were as John noted above.

Bob

[jwc66k]

Regular old 67-68 Mustangs use (1) a 2-wire flasher for turn signals, (2) a separate 2-wire flasher for emergency flashers, -

Sligtly off topic, flashers are also identified as being for "2 lamp" for turn signals and "4 lamp" for emergency flashers.  I don't remember the symptoms or specifics, but they normally don't interchange.
Jim

[kkupec02]

Thanks all. I'm still working on my wiring problem.

[67gta289]

Sligtly off topic, flashers are also identified as being for "2 lamp" for turn signals and "4 lamp" for emergency flashers.  I don't remember the symptoms or specifics, but they normally don't interchange.
Jim

More bulbs take more current, more current will heat up the flasher bimetallic element faster. So a 2 bulb flasher in a 4 bulb circuit will have a mouth shorter (probably by 4 times) on dwell time.