[Re-sending because I failed to copy the list; if I've misstated
anything, I want to hear the corrections.]
How large is the cable from the alternator to the battery? That should
be #4 minimum also, else the voltage drop from alternator to battery
will reduce the battery's voltage such that it won't really charge.
Voltage at the battery posts is what drives current in. If it is less
than 13.2+/- volts, the battery won't be charging.
The battery voltages all sound somewhat low, which is why I'm suspecting
alternator-to-battery connection. It could also be resistance in the
alternator frame to engine to vehicle frame to battery post connection
chain.
HTH,
Donald.
--
*Plain Text* email -- it's an accessibility issue
() no proprietary attachments; no html mail
/\ <https://www.georgedillon.com/web/html_email_is_evil.shtml>
On 2021-08-05 10:33 a.m., john niolon wrote:
> Took the truck (53 ford f-100) out for a drive yesterday?first time
> since the Grand Nationals (I?ve been busy) Ran great for about 30
> minutes with a couple of stops during the ride? each time it started
> right and showed no problems. Electric fan and a/c running the whole
> time As I pulled out of one business and headed home the truck stumbled
> and died..almost like it was out of gas? ( had over a half a tank) I
> pulled into a business and tried to start it and all I got was a
> ?click?. Dash Volt meter read about 11 volts with switch on and dropped
> to zero when hitting the starter. Waited about 10 minutes and it started
> right up? got it home, shut it off and same thing ?click?.
>
> Battery has been on a battery tender full time since May and showed 13.7
> volts on VOM connected to the battery before the ride.
>
> Battery is 2 years old Everstart Maxx27 800 CCA ?
>
> Davis DUI ignition (which could have quit when battery voltage got low)
>
> All cables are new with 1/0 welding cable for starting circuit and
> battery ground to frame
> engine to frame, frame to cab and frame to bed are all #4 wire to bare
> metal connection points with dialectic grease.
>
> At first glance...when running, the volt meter on dash shows over 13
> volts so I think alternator is good
>
> did a load test with a H.F. (100 amp) load tester showed battery
> dropping to 10 volts during 10 second load... recovered to 12.
>
> Put truck up on stands and dropped battery (under cab) checked all
> cables and connections from battery to starter including solenoid and
> ground connections.
> all tight, no corrosion on terminals and cells full. this truck
> finished last year and everything is new. Starter solenoid is
> a Cole-Hersee 200 amp continuous draw solenoid.
>
> Starter is new last year and 6-7 inches away and below headers so heat
> soak isn't causing the problem
>
> Set it back down and charged it for 30 minutes at 10 amps... battery
> showed 12.9 volts.. started ok and put meter on alternator
> terminals... alternator putting out 14.5 - 14.8 volts... varies
> a little with engine speed.... so alternator is good I think.
>
> I did a load test again.,.. idle voltage reading 12.9 volts on two
> different fluke meters... and during the load test it dropped to 12.3
> then recovered to 12.7...so I'm assuming the battery is good, it was
> just low before the first load test.
>
> here's an odd thing.. I have a 12 volt terminal on the right frame rail
> that powers the elec radiator fan, tilt hood motors and trinary switch
>
> with the a/c on, headlights on and elec radiator fan running (as much
> load as I can put on it)... the alternator o/p at 14.5 volts, the
> voltage at the terminal on rail reads 11.5 volts. The terminal is 4'
> from battery and fed with #4 stranded wire.
>
> that's about all the detail I can give you... any ideas why it stalled
> and quit..??? and why the terminal point only reads 11.5 versus the
> 14.5 at the alternator.
>
> I'm at the wall
>
> thanks
> john
>
> _______________________________________________
>
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.96
> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/dhlocker@comcast.net
>
_______________________________________________
Shop-talk@autox.team.net
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
utox.team.net
|