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Ballast Resistor[200/1979] posted by Dave Farrington on
Saturday, 15 January 2000, at 5:13 p.m.
A couple times in the last two weeks my '79 245 has failed to start with it's usual eagerness. The first time I managed to jump and proceed along. The second, in New England's current 0 degree cold, I only got started solenoid clicking. From the 700 faq, first culprit was main wiring, battery's only 3 months old, connections clean, so I cleaned and remade grounds, to no avail. Thus in wonderful, pleasant weather, I changed the starter. After which it started up with the with it's usual eagerness, but died 100 yards into a check drive, started right back up, then did it again, then again.
Looking things over, I find my ballast resistor's a bright cherry red. Not a good sign and the dealers are closed and the same for the junk yards. I'm sure this is all telling me that the thing is dead, but I'll welcome any insight. The Pep Boys, etc. will be open on Sunday - could I get some generic resistor?
Thanks,
Dave F.
'79 245 DL, 270k, '88 745T 200k, '73 P1800ES, 101k
Re: Ballast Resistor[200/1979] posted by Paul Kane on
Saturday, 15 January 2000, at 6:15 p.m.
You can use a generic
Spec says 1 Ohm - but not the power rating -- Go for the highest available to be on the safe side (This is an engineerig 'cop-out' since these are normally a 'sand/ceramic' type - I would guess around 10W or more)
In a 'jam' they can be by-passed - but replace ASAP
Re: Ballast Resistor[200/1979] posted by Don Foster on
Saturday, 15 January 2000, at 7:13 p.m.
And in a bind, you can mix 'n match to achieve both the resistance and power rating.
For example, two 2-ohm, 10-Watt resistors in parallel result in 1-ohm, 20-Watts.
Likewise, two 1/2-ohm, 10-Watt resistors in series result in 1-ohm, 20-Watts.
Moreover, ten 10-ohm, 1-Watt resistors in parallel make a lump capable of handling 10-Watts at 1-ohm.
Radio Shack could certainly supply any number of 1-, 5- or 10-Watt resistors that could be arranged in a series-parallel network to achieve whatever is suitable.
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