| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 88.1 | "Pulsing" Lights | LEDDEV::UGRINOW | | Mon Jan 11 1993 09:54 | 15 |
| 88.2 | Voltage regulator? | MPGS::JGRADY | GROUND POUNDERS | Mon Jan 11 1993 14:58 | 5 |
| 88.3 | | LUDWIG::YACINO | | Tue Jan 12 1993 12:35 | 4 |
| 88.4 | how to check?? | LEDDEV::UGRINOW | | Tue Jan 12 1993 12:48 | 12 |
| 88.5 | might be really simple | BARUBA::REARWIN | Reinheitsgebot | Wed Jan 13 1993 12:29 | 2 |
| 88.6 | Battery trouble light on in Dash | CIGRBX::WARD | | Mon Apr 19 1993 10:32 | 17 |
| 88.7 | Possible oil pressure sender error | BROKE::TAYLOR | Just hang up the phone and drive! | Mon Apr 19 1993 13:30 | 20 |
| 88.8 | problem found in f150 | CIGRBX::WARD | | Mon May 03 1993 11:42 | 8 |
| 88.9 | | SNKERZ::SOTTILE | Get on Your Bikes and Ride | Mon May 17 1993 10:31 | 11 |
| 88.10 | Replace it! | MLTVAX::FISHER | Kill your television | Mon May 17 1993 10:52 | 7 |
| 88.11 | Voltage Regulator | SNKERZ::SOTTILE | Get on Your Bikes and Ride | Wed May 19 1993 09:46 | 4 |
| 88.12 | What about the bulging battery? | TROOA::TROU94::YUEN | Wanna be eccentric, but need $$$ | Wed May 19 1993 10:51 | 3 |
| 88.13 | | SNKERZ::SOTTILE | Get on Your Bikes and Ride | Wed May 19 1993 11:11 | 5 |
| 88.14 | Boy, you like to live dangerously. | CSC32::D_ROYER | Chi beve birra campa cent'anni. | Wed May 19 1993 12:00 | 4 |
| 88.15 | | SNKERZ::SOTTILE | Get on Your Bikes and Ride | Wed May 19 1993 13:45 | 9 |
| 88.16 | If the voltage is right, it's OK | LEDS::LEWICKE | Bosnia, Waco, what's the difference???? | Wed May 19 1993 14:52 | 8 |
| 88.17 | Hopefully my supply of spares will hold me through | MLTVAX::FISHER | Kill your television | Wed May 19 1993 18:00 | 5 |
| 88.18 | | SNKERZ::SOTTILE | Get on Your Bikes and Ride | Thu May 20 1993 09:48 | 12 |
| 88.19 | 1981 subaru hatchback | CSC32::W_TUTTLE | | Tue Oct 31 1995 01:10 | 29 |
| 88.20 | Blazzing Dash On '86 Toyota Van | USCTR1::GHIGGINS | Oh Whoa Is Moe | Tue Oct 31 1995 10:53 | 32 |
| 88.21 | Dry? | TEKVAX::KOPEC | we're gonna need another Timmy! | Tue Oct 31 1995 12:51 | 3 |
| 88.22 | Sqeal!!!!! | BRITE::FYFE | | Tue Oct 31 1995 16:40 | 5 |
| 88.23 | ex | USCTR1::GHIGGINS | Oh Whoa Is Moe | Wed Nov 01 1995 13:52 | 7 |
| 88.24 | Alt must be connected to battery. | SALEM::GILMAN | | Mon Nov 13 1995 15:13 | 8 |
| 88.25 | 79 dodge charging problem | SALEM::LEAVENWORTH | | Thu Oct 17 1996 08:22 | 20 |
| 88.26 | 3 years? could be shot.. | TEKVAX::KOPEC | When cubicles fly.. | Thu Oct 17 1996 11:43 | 10 |
| 88.27 | Crossposted in Carbuffs ... | BRITE::FYFE | Use it up, wear it out, make it do, or do without. | Mon Feb 03 1997 09:31 | 59 |
|
1984 Cadillac: faulty charging system
Configuration:
#2 terminal is connected to output post via 10g wire. (This
was the original configuration, he bought the car used
several years ago).
#1 terminal is connected to brown wire attached to ignition.
Output post connected to positive battery post.
Ignition on - engine off, the alternator (charging system) light
is on. Battery surface charge at 13.5v
Start the engine, the light goes out, and voltage rises to 14.5
Symptom:
If a load is put on the alternator, such as turning on the
headlights or heater fan to high, the voltage drops quickly
to 13v then moving slowly to 12v (alternator appears to stop
charging and car is running off the battery).
There are two behaviors that occur when the load is removed.
Sometimes, the voltage slowly works its way up to 14.5v (alternator
working).
Sometime the voltage stays low. In this case, pulling the alternator
harness results in increased engine speed (alternator was generating
a load on the engine but not putting out current). Reconnecting the
harness results in 14.5v (immediate) and reduced engine speed (due
to increased engine load) .
When the voltage drops to 13 or less, the alternator light in the dash
does not illuminate.
Original and several rebuild alternators exhibit the same properties.
The original battery, while not very old and testing good, was
replaced with a new one.
My involvement:
I got a call from my brother who was having difficulty with this
car. When I got there, I found my brother replaced the alternator
clip and connectors due to the old one being frayed and broken.
These clips were also making a poor connection, which I fixed.
We had run a separate connection between the battery and the output
post to eliminate the possibility of bad connections or broken
cable to the battery.
The story is consideralbly more invloved than this, but I'll spare
the readers the details (my brother made a few mistakes along the
way). He has swapped out several (4?) alternators all with the
same symptoms.
What is the cause and/or how do I diagnose/fix the problem?
Doug.
|
| 88.28 | CHECK THE GROUND PATH | USCTR1::MCANDREW | It's 1A6B5A2B3A4B6A1B2A5B4A3B | Wed Feb 05 1997 14:02 | 22 |
|
Seems like your getting a large voltage drop when the charging
current increases due to demand.
It could be a high resistance in the battery to engine ground path,
or the alternator to engine ground path.
An 84 has had plenty of time to develop some corrosion in the
connectors, cables, and fasteners to engine block, brackets, or
mountings. Just one ohm when there should be one or two TENTHS of an
ohm, will cause a significant voltage drop when 40-60 amps is
coming off the alternator.
Clean up and tighten all connections in the ground paths. If you have
an accurate DVOM, check the resistance of the battery ground cable from
the battery clamp (DISCONNECT IT FIRST) to the alternator frame. Wiggle
things around to be sure nothing is intermittent.
Regards, Jim
engine
|
| 88.29 | | BRITE::FYFE | Use it up, wear it out, make it do, or do without. | Wed Feb 05 1997 15:02 | 1 |
| The unexpected answer is posted in Carbuffs ...
|