posted January 03, 2008 19:55               

Until a few years ago i drove a Dodge M880 pickup truck.
With a pretty impressive engine.
During startup the startermotor would draw so much power that the voltage dropped to 9 volts.
The coil however would prefer 12 volts to produce strong enough sparks.
So what Chrysler did was install a coil which needed 9 volts.
Now once the engine was running of course the whole circuit was back to 12 volts (and some) thanks to the alternator now charging,so the coil would be toasted.
So in the circuit was an extra resistor,lowering the voltage to 9 volts during running,but bypassed during starting.
Now i don't have a petrol Dexta,so this idea could be utter bollocks when it comes to Dextas,anyway i hope it is helpful...

posted January 03, 2008 22:34               

the "coil" terminal delivers the glow switch, the horn button and the small switch on the top of the starter motor with energy. I can send you a diagram by e-mail ... just let me know.

posted January 03, 2008 23:57               

early tractors were fitted with a combined "light-igniton-switch". Later the tractors were fitted with two switches, a light switch and a igniton switch, because the early switches were not waterproof and caused to problems. The "Coil" terminal is the same as "15" on modern vehicles ...

posted January 04, 2008 00:03               

Thank you very much for clearing that up,Stefan.

posted January 04, 2008 00:05               

yes, you're right ... just the name of the terminal.

------------------
Best Regards
Stefan
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www.fordson-dexta.de

posted January 04, 2008 12:40               

quote:

---

Originally posted by ger-man:
Matt,

the "coil" terminal delivers the glow switch, the horn button and the small switch on the top of the starter motor with energy. I can send you a diagram by e-mail ... just let me know.

---

Hi all - thanks fo taking the time to reply - yes, I can confirm that the tractor is a diesel one, so there is no coil per se.

Stefan - if you have a diagram you could mail me, I would be very grateful - would certainly help stop me making any more wiring errors that lead to the battery terminals melting!!!!!!

posted January 04, 2008 19:41               

I need to know .... is the voltage regulator fitted with 4 or 5 terminals?

posted January 06, 2008 21:31               

quote:

---

Originally posted by ger-man:
Matt,

I need to know .... is the voltage regulator fitted with 4 or 5 terminals?

---

Hi Stefan - been to look today, and it is 4 terminals on the regulator.

posted January 06, 2008 23:31               

just sent it to you, hope it will be a good help to you. Keep us posted.

posted January 13, 2008 22:30               

quote:

---

Originally posted by ger-man:
Matt,

just sent it to you, hope it will be a good help to you. Keep us posted.

---

Hi Stefann/all - did my translation and been over the the tractor today, and got it wired up successfully! Thanks for all your help. I'm keeping a pohotgraphic record of what we've ben upto, so if anyone needs any photos while everythings still off, please don't hesitate to ask.

posted January 15, 2008 22:36               

I have been going through the same head scratching with a combined ignition and light switch this weekend on my '59 Dexta. I also have a 4 terminal regulator box.

I would really appreciate it if Stefan/Matt were able to send me the same diagram so I can make sure that I have it right before the big switch-on.

Many thanks

posted January 16, 2008 17:43               

just sent it to you. Good luck on the job and don't flambč the wiring

posted January 21, 2008 22:23               

Checked the new wiring with the diagram and it looks like I have it right! Have it all on the Dexta now but sorting out some other bits before I fire up. However I have cracked open the mainfold heater switch and had a fiddle and a clean and now have on operational glow plug for the first time.

Now I need to turn my attention to the lights. I have fitted some new lenses and reflectors to the original headlights but I am not sure about the wiring. I don't have any wiring on the back of the bulbs as a clue, just the terminals. The bulbs are RAJULEX 12v 45/40W. Can anyone help me with which terminal is which when viewed from the rear of the bulb, eg left, top and right terminals.

Thanks again for the fantastic help on this forum.

posted January 21, 2008 22:46               

RAJULEX?? Bulbs from India, look at google

is it like this one?

... if so, the terminals are as follow:

Left = Negativ
Top = Lower-Beam
Right = High-Beam

------------------
Best Regards
Stefan
-----------------------
www.fordson-dexta.de