Re: {Chrysler 300} Trouble in F land.

["'John W Sager' via Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>]

The last one I had fail was years ago, so I'm going by memory. 

The failure was with an open back ballast resistor and as I remember, the resistance wire was broken along with the ceramic rod that the wire was wound around. If I had to bet, I'd say the rod broke first. Probably running a little hot and then got wet. 

I have seen a few fail on other cars were there was actual physical damage to the ceramic block itself and that let the terminals flop around until the connected resistance wire failed, probably from vibration. How they got damaged in the first place was anybody's guess. Although I think I might have broken one on my own car during a late night engine swap. 

John

On Tuesday, August 15, 2023 at 08:06:11 PM EDT, Rich Barber <c300@xxxxxxx> wrote:

Many/most electrical problems are at connections.  The ballast resistor has good solid connections to spades on each end plus two connections inside the ceramic housing joining the resistor wire to the spades.  The ballast resistor on our K is open at the back to allow heat transfer and some protection from underhood environment.  The resistance wire itself may deteriorate after years of service at high temperature and vibration.  Has anyone examined a failed resistor to see what failed?  I would think intermittent connection of resistance wire to be unlikely.

 

I just measured the resistance of the ballast resistor on our 300K at 0,6-0.7  Ohms on a 200 Ohm scale. FSM spec’s are 0.5-0.6 Ohms at 70F-80F.  At 0.6 Ohms, it would take a 10 Amp current to the coil.  Seems a little high.  Nichrome resistance wire (if that’s what we have) Resistance and therefore, Voltage drop, increases with operating temperature.  Over 90F in garage today. 102F outside at 5 PM, PDT.

 

Rich Barber in CA

 

From: 'John Cote' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Monday, August 14, 2023 12:46 AM
To: Jean-Yves Chouinard <jymopar@xxxxxxxxxxx>
Cc: Steve <sbeard2@xxxxxxxxxxxxxxx>; Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} Trouble in F land.

 

From your symptoms, I would put my money in the ballast resistor on your firewall. Same happened in my ‘61 NYer wagon. Changed it and ran fine again. A much overlooked electrical item. 

John

Sent from my iPhone

On Aug 14, 2023, at 12:05 AM, Jean-Yves Chouinard <jymopar@xxxxxxxxxxx> wrote:



I would change the condenser in the distributor...as it was mentionned lately on a related thread, some are unreliable and work erratically...

JYves

 

---

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> on behalf of Steve <sbeard2@xxxxxxxxxxxxxxx>
Sent: August 13, 2023 9:55 PM
To: Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} Trouble in F land.

 

Hi 300 ites,

Problem with my F.

????

Ran the F last Sunday, ran great.55 to 70mph

Fueled up( 7 gals)

Came home and engine  died.

Wants to fire but not.

Today,drained out all gas,new gas in, pumped and finally fired up. Ran 10 minutes, the rpms dropped.and died.

Cranking/ trying to fire but not starting. Pumps gas and spark is good blue.

Going to put new plugs in tomorrow and back to duel points. 

Any thoughts,

Thanks in advance for your thoughts.

Steve Beard

300 F

Delaware,Ohio 

 

 

 

 

 

Sent from my Verizon, Samsung Galaxy smartphone

 

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