 Help! Serious Electrical Problems!, The weirdest thing I've ever seen... |
 Apr 12, 2005 - 2:03 AM
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 Administrator  Joined Aug 23, '02 From Seattle, WA Currently Offline Reputation: 14 (100%)  |
I'm so confused and scared right now...I can't figure out for the life of me what's going on with my car.
 It started with me trying to start it, and only the fans turning on. I checked the fuses and none were blown, so I checked the switched wire at the starter, and it was giving me no voltage. I then unplugged the battery and went inside to take a break. When I came back out and plugged the battery back in, I noticed that the trunk light didn't turn on. I looked at the dash and the door open light wasn't on either. I tried turning on the parking lights and they didn't turn on. I tried the horn and it didn't work. Basically, nothing on the car works. This is where it gets confusing. I've got a fuse 6" from the battery, and it's in good shape. Figuring I'd popped some other fuse, I checked all of them in the dash and under the hood, and they were all good. I pulled the main 50 amp fuse under the hood and tested voltage on the hot side. Voltage started at around 10 volts and over a couple seconds rose to 12.4 volts and held there. I then tried the same thing for the horn fuse under the hood, and it started at about 8 volts before rising to 12.4 and staying there. At this point I disconnected the negative cable and came inside. Someone suggested testing voltage between the terminals and the clamps with the headlights on to test for a bad battery connection, but this yielded no voltage. At the battery terminals, I'm getting 12.4 volts. At the battery's fuse and a bolt in my trunk, I'm also getting 12.4 volts. At this point, I'm so confused. I've never seen anything this weird in my life. Anyone have any ideas?
-------------------- New Toyota project coming soon...
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Replies
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Apr 15, 2005 - 8:29 AM
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Enthusiast Joined Nov 9, '03 From Dayton, OH Currently Offline Reputation: 2 (100%) |
Croomer, Im pretty sure you should be pulling 12v at the alternator with the car off. Just like BlackCelica said, there is a main power wire that runs directly off the battery through a fuseable link in the fuse box then to the alternator. So its not relayed therefor you should be getting 12v all the time to the alternator.
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Posts in this topic
Coomer Help! Serious Electrical Problems! Apr 12, 2005 - 2:03 AM
Batman722 Don't be scared, it'll be OK. It sounds li... Apr 12, 2005 - 2:11 AM Coomer I took out my alarm recently and was working on re... Apr 12, 2005 - 2:17 AM Silvan The voltages you measure could indicate that the b... Apr 12, 2005 - 4:42 AM bufferdan Test main power source going to the alternator... Apr 12, 2005 - 8:48 AM sapperk I had that problem on a smaller scale. It turned o... Apr 12, 2005 - 6:32 PM prez i had a similar problem and every few days my batt... Apr 13, 2005 - 2:28 AM slipgun Prez, I have a simmilar problem... it drains if I ... Apr 13, 2005 - 4:52 PM Coomer My battery is fine. I took it out and had it teste... Apr 13, 2005 - 6:22 PM Snarfer What is the voltage drop from the hot side of 50A ... Apr 13, 2005 - 6:29 PM bufferdan Like i said..test for voltage going to the alterna... Apr 13, 2005 - 7:54 PM
Coomer QUOTE(bufferdan @ Apr 13, 2005 - 5:54 PM)Like... Apr 13, 2005 - 8:14 PM 946thGenGT If it were me I would be backtracking through all ... Apr 13, 2005 - 8:21 PM Coomer QUOTE(946thGenGT @ Apr 13, 2005 - 6:21 PM)If ... Apr 13, 2005 - 8:25 PM 946thGenGT QUOTE(Coomer @ Apr 13, 2005 - 7:25 PM)QUOTE(9... Apr 13, 2005 - 8:45 PM bufferdan IF you are loosing ALL power then it IS a MAIN POW... Apr 13, 2005 - 11:34 PM von125 I`m with Bufferdan on this. If your getting low vo... Apr 14, 2005 - 6:09 AM Coomer The alternator is getting +4 volts when the car is... Apr 14, 2005 - 11:09 PM BlackCelicaGT94 my dad says
"theres a wire that comes off t... Apr 15, 2005 - 12:49 AM Coomer Bump. Anyone got an answer for my alternator quest... Apr 15, 2005 - 7:27 AM bufferdan Get a decent sized wire...or even a jumper cable. ... Apr 15, 2005 - 8:33 AM stormtrupr have you checked all of the fuses with a multimete... Apr 15, 2005 - 9:40 AM Akimbo last time i had problems it was neither the batter... Apr 15, 2005 - 11:07 AM Coomer QUOTE(bufferdan @ Apr 15, 2005 - 6:33 AM)Get ... Apr 15, 2005 - 10:16 PM Batman722 remember when you got rid of alot of extra wires i... Apr 15, 2005 - 11:13 PM Coomer I unwrapped the harness and inspected all of the c... Apr 15, 2005 - 11:25 PM Coomer I just realized that even with the four gauge wire... Apr 16, 2005 - 1:03 AM Dm_Vinny Coomer,
Me personally I'd start off tracing... Apr 16, 2005 - 1:19 PM madmods What did you actually wire from your alarm? Starte... Apr 16, 2005 - 1:22 PM Coomer QUOTE(Dm_Vinny @ Apr 16, 2005 - 11:19 AM)Coom... Apr 16, 2005 - 1:43 PM madmods QUOTE(Coomer @ Apr 16, 2005 - 6:43 PM)QUOTE(D... Apr 16, 2005 - 2:16 PM Silvan Take one cable off from the battery, and measure t... Apr 17, 2005 - 4:41 PM Coomer OK,
I managed to get the car started and running y... Apr 17, 2005 - 9:09 PM 946thGenGT How did you manage to get the car started? Or are... Apr 17, 2005 - 9:51 PM Coomer QUOTE(946thGenGT @ Apr 17, 2005 - 7:51 PM)How... Apr 17, 2005 - 11:35 PM 946thGenGT Any updates? Apr 19, 2005 - 9:37 PM Batman722 QUOTE(Batman722 @ Apr 15, 2005 - 11:13 PM)rem... Apr 19, 2005 - 9:45 PM Coomer Not yet. I don't have time to work on the car ... Apr 20, 2005 - 1:48 PM Coomer OK,
So the car is worse than ever now. On Monday, ... Apr 21, 2005 - 10:08 PM stormtrupr sounds like the fuse connections arent good and ca... Apr 22, 2005 - 10:00 AM Coomer QUOTE(stormtrupr @ Apr 22, 2005 - 8:00 AM)sou... Apr 22, 2005 - 10:51 AM stormtrupr i thought you had....i just misunderstood you last... Apr 22, 2005 - 3:50 PM Snarfer I'm confused at what you mean resistance betwe... Apr 22, 2005 - 5:05 PM Snarfer I would check out the integrated relay and jb#1 wh... Apr 22, 2005 - 5:59 PM Snarfer I will only keep these on my filebox for a week, s... Apr 22, 2005 - 5:59 PM Coomer Snarfer,
Thank you so much. I had the component lo... Apr 22, 2005 - 6:14 PM Coomer Finally, I made some good progress tonight. I fixe... Apr 23, 2005 - 12:36 AM Coomer According to this Toyota god that I just talked to... Apr 23, 2005 - 2:27 AM Hanyo good job on finding the electrical problems Christ... Apr 23, 2005 - 2:56 AM Snarfer on page 28 of that electrical guide there is somet... Apr 23, 2005 - 12:40 PM Coomer QUOTE(Snarfer @ Apr 23, 2005 - 10:40 AM)on pa... Apr 23, 2005 - 10:22 PM Consynx thx coomer, but im not a toyota god Apr 23, 2005 - 10:55 PM Batman722 QUOTE(Coomer @ Apr 23, 2005 - 10:22 PM)QUOTE(... Apr 23, 2005 - 11:37 PM Coomer My ground to my tranny wasn't very good. Why i... Apr 24, 2005 - 12:44 AM Drocay good to hear bro, u had us worried. Apr 24, 2005 - 10:36 AM Snarfer Heh, after I rebuilt my engine I didn't hook u... Apr 24, 2005 - 11:41 AM DamDirtyApes nm Apr 24, 2005 - 9:31 PM slipgun YES!!! Great work guys!!!... Apr 25, 2005 - 8:33 PM |
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