Is this an electric choke relay?

[DanielC]

I am working on the wiring harness for the Canby truck.  It has an extra relay close to the voltage regulator. that I do not have on any of my five 521 trucks.

This is the top of the relay,

and the bottom.

 

The yellow wire on the relay harness plug has continuity to the small "T" connector on the alternator.

The blue wire on the relay harness plug has continuity to a blue wire on the firewall, by the carb.

[MikeRL411]

The year of your 521 just might make a difference.  Assuming that this is a 521 since you posted in the general "Electrical" area.  You cannot give too much info when you are asking for help.  Hope a few additional details get you the help you need.

 

Good luck, keep them rolling, they don't look too good in the junk yard.  They're great on the road!

[dat521gatherer]

I think it's e1 or e2. One is located next to the coil and the other is next to the volt reg. I think it's related to the 3rd gear switch and the dual points. I'll look at my wiring diagram.

[dat521gatherer]

[dat521gatherer]

There were only 5 relays on the last year 72 521. horn, lights, e1, e2, volt reg. The last year e1 or e2 next to the volt reg went from a 3 individual spade connection to a plug.

[dat521gatherer]

I have a 71 and 72 I'll go outside and look.

[dat521gatherer]

Yep it's for the ignition. I put a eletronic dizzy in my 71 and removed both the e1 next to the coil and e2 next to the volt reg or vise versa. The 72 had a plug instead like I thought.

[dat521gatherer]

[datzenmike]

I believe only the '72 had electric choke.

[banzai510(hainz)]

my 72 521 has a electric choke wire I don't use it rite now.