I had to replace my alternator (single unit) and after installation it seems only 1 of the 2 batteries is charging when I check them while the truck is running. What check or could be the problem?
View 1 RepliesOK I have 14.04 volts at the batteries with the engine running but my battery light is on. I had the alternator checked off the engine and on the engine and it tests good. Shows good batteries and good charging. Is there something internal to the alternator that would make the light come on even though the alternator is charging ok? Or is there something else that would make the light come on. This is on a 1999 F250 Superduty Powerstroke 7.3.
View 14 RepliesMy alternator quit charging last night. Was pretty much a sudden onset as I was driving down the road and left off the accelerator the battery light came on and lights dimmed a bit. When I stepped on the accelerator again they bat. light went off and the lights came back up.
At idle I'm at 11.77v. I've pulled the plug on the back of the alternator and I'm getting voltage on both the red and green wires that go into the plug with the engine running. Is this correct?
Pretty much as the title says, I'm having an interesting electrical gremlin. Ford 7.3 super crew 2002 lariat LE.
I have batteries from 2015 that are losing their charge, both of them. It's like the alternator isn't charging them. Truck will struggle to start until jump started, then she's fine.
Symptoms are:
ABS light comes on when as best I can tell the batteries aren't getting charged. Not the battery indicator.
Now that the batteries are low enough, on the instrument cluster the little light the powers the mile LCD screen dims when it's not getting power (but it's fine when the batteries have charge.)
All accessories work when driving, but I haven't been able to drive a long while on the "not charging phase" to see how low they're go.
Batteries register dead (now) because they haven't gotten charge in a while.
When the alternator IS charging or "connected" I can leave the truck idle and she'll charge the batteries, truck will start just fine on the next run (no parasitic drain.)
Driving causes this to happen randomly, doesn't happen when I'm stationary, nor do I believe it CHANGES state (so if I'm idle it won't suddenly NOT charge if it was charging before.)
Narrowed down to 2 probable things.
Alternator
Bad alternator to battery cables
Took in the alternator to get it checked and they said it was good. Put it back on and it seemed like it was charging according to my volt meter (14.24-13.5 v)
Today, it's not charging. Only reads 12.2 v while running. Is there a fuse or something I need to check? Grounds? It seems intermittent.
2003 F-250 V10 6.8 liter 255,000 miles.
for some reason my battery light flickers when im driving regular and on the highway. I have had both batteries checked and they were at 50 percent charge and both were good so therefore I assumed it was my alternator. I removed alternator had it check and it passed all test. Everything was checked at o'reilly and autozone
View 8 RepliesI have a 2000 excursion that stopped charging. The battery light is on . I replaced the alternator but it still will not charge. I have checked all the fuses. Not sure where to go from here...
View 2 Replies2002 f350 super cab 7.3 diesel, replaced alternator because wasn't getting charge to batts, Napa guy checked batts and determined no charge, replaced alt, still no charge, have 12v at alt post with engine running or not. My ? is, is there a fuse in here somewhere that I'm missing? Went through all fuses in fuse panel all good.
View 7 RepliesI put an O'reileys alternator in my truck today. Drove it most the day and did some plowing with it and it was fine. I just went out to run to the gas station and now the battery light is on. The voltage is still good.
View 14 RepliesI have a 1999 f-350 V-10. My battery light came on, making me believe that my alt. has quit. I can't see the plaque on the alt so I can't tell the amps. Does my serial number on the truck tell the amps, or do i have to remove the alt to check the amps?
View 3 RepliesI replaced my alt. because in the morning the bearing would squeak and the head lights flicker. It was a life time alt. Put the new one in now it wont charge. Took it back and got another, same thing. Also replaced the starter relay and battery. I checked the fusible links and replaced a terminal connector. The wires look good. There is 12v on the alt lug and pins 1 and 3 on the connector with the key off. Turn key on and 12v disappears form pins 1 & 3. Also checked all fuses in both boxes. I ohmed out the wire harness from the alt back to the connectors, all good. What am I missing? This is a 99 f530 5.4l.
View 9 RepliesI went to start my 2006 F350 6.0 this morning. 20 degrees outside. It nearly turned over, then it appeared that the batteries would not support another start - a slowing of the pre-engine start revving....
So I let it sit a while, now it won't start at all. When I try to start it, the dashboard flashes, clicking sounds occur and even after pulling out the keys, the needles on the gauges shake for a few seconds.
Is this more a battery issue or an alternator issue?
I have a 2008 f 250 super duty gas v10 i have never had problems with it start always starts right up and strong. After coming out of the story today I tried the remote start and it tried to turn for a couple seconds and stopped. I replaced the battery and starter and still nothing. i hear the relay when trying to start with both keys or remote start but nothing from the starter all lights are working .
View 1 RepliesBattery symbol light appeared on dash, After determining battery was good, I removed alternator and took it to have it bench tested at the parts store. It tested bad so I purchased a rebuilt alternator and had it bench tested before I left the store and it tested good. I installed it and it won't charge the battery. Tried a new battery...same thing. I tested the voltage at the battery and it reads 12.3 and the same with engine running. Engine runs until battery is drained. I removed the alternator and took it to a different store and they bench tested it good also!
View 8 RepliesHow many Volts available at plug for charging FW batteries, and what can be don to trick alternator in to keep charging when truck batteries full, install larger wires? From alternator or truck battery, if yes which battery. 2015 F350 Lariat 200 alternator.
View 14 RepliesGot my 240 amp alternator in and had all new 1/0 GA battery cables with a 250amp fuse in line made to do all new lines. I started tonight and found a small line going from the alt connector down the power line to a fuseible link (fuse) all in the power line
I wanna do away with the main 4 ga alt wire but obviously I can't do anything with that line going to the plug. Can I put a connector on it and wire that into the one side of the 250amp fuse.
The only other option is to add a wire to beef up the stock line ....
The V10 in my service truck took the long slow ride. I located and am in the middle of replacing said engine. My question is, how difficult would it be to install a second alternator in this truck, considering I have it torn down for replacement?
It a 2000 F350 with a V10. I'm looking for more power as I have mounted on the Knaphiede service body a IMT 1015 crane, 3200 lb capacity. I would like to install a power inverter to be able to run an air compressor in the field.
Am I looking for a new harness? Etc?
I have had this whining noise that I'm not sure what it is. It sounds like its comin from the alternator area. There are three symptoms that are confusing me though, 1st is I only hear this whine as the weather starts getting colder and the colder it is the louder it is. 2nd is it only happens around 1800rpms like when it's getting ready to shift to the next gear. I can get it to whine when I'm parked and bringing the rpms up. 3rd is after 10-15 minutes when the truck is warmed up - no more whine. The truck is used very little duing the summer and I had this whine all winter last year. Alternator appears to be working fine and I do plow a few driveways every storm. Money is tight so I don't want to replace the Alternator an find it wasn't the problem.
View 3 RepliesWhere the battery junction box is? I've been all over under the hood, and dash, and not seeing it. It's not small, since it's full of relays and fuses, and should have a large wire bundle going to it.
View 7 RepliesIs there a fusible link from the alternator to the battery? The new alternator that I put on and got tested is not charging the battery. Was wondering if it could be a fusible link but I couldn't find it. Where it is located on a 2000 ranger?
Also, I put a DC volt meter on the negative side of the battery and the positive side of the CHARGING wire that would be connected to the alternator and got the same reading as if I put the meter on the positive of the battery.
Does this mean the fusible link is good?
My trouble is that the alternator light on my 2004 F-250 Diesel began to come on occasionally, but never constant. Taking in the fact that it was still the original alternator, and over 70,000 miles, I figured it was time for a new one. I installed the new one and after two days the light came on again. I tested the alternator and it read 13.84 volts while running. With the engine shut off, I had 12.59, and 12.6 volts at the batteries. What may be my problem? Diesel down.
View 8 Replies