Electrical Problem

terribleonexx88 · November 4th, 2006, 10:37 PM

i just got my 88 5.0 back together from changing the head gaskets it started right up first time and i adjusted the timing the beast i could and was on my way. the next day it was struggling to start then a couple days later(today) i got a timing light to do the timing right but the after adjusting the distributer it didnt have any juice to crank it over so we jumped it and it started right up drove for a soild 20min thinkin the alternator would charge it right up and went home turn it off let it sit for a minute then turned the key it cranked but had no juice. jumped it again let it idle for a while then 15 min of idling the rpm dropped so i revved it up and it was fine . shut it off after 25min of idling then tried to start it and yet again cranked but not enough to start it.... any ideas

Mustang8719 · November 5th, 2006, 08:02 AM

Sounds like the Alt. isn't charging. Check the Grounds on the back of the Head and make sure they are connected. Considering the Heads were just off.
Also make sure all the wires are connected goot to the Alt.

terribleonexx88 · November 5th, 2006, 10:54 AM

i looked behind the heads and near the driver side theres an orange wire with a metal ring on the end and a braided ground with a ring on the end of that, ill go screw those in the back of the head now

thanks

terribleonexx88 · November 5th, 2006, 11:34 AM

how long a drive will fully charge the battery

Mustang8719 · November 5th, 2006, 12:15 PM

Usually about 30 minutes to 1 hour of driving.

Is it charging now?

It would be better to charge with a battery charger if you can find one.

terribleonexx88 · November 5th, 2006, 04:53 PM

i drove around the the block a couple times and it didnt really do anything but the volt meter read a little higher, ill ask around for a batt. charger

stang fanatic · November 5th, 2006, 06:57 PM

battery may justbe going bad and wont hold charge long after shutdown. need to load test batt and alternator..if all ok, disconnect ground at battery and put a test light between the batt post and cable, if it lights up bright, then something is drawing too much voltage

terribleonexx88 · November 5th, 2006, 09:17 PM

i tested the voltage with a meter it read 12.7

stang fanatic · November 5th, 2006, 09:29 PM

an alternator can put out 12 volts, but when its rated for say 100 amps, and its only putting out 60 amps...the battery never gets enough of a charge to last. Alternators that put out less than 15% of their rating are considered bad and need to be repaired or replaced

terribleonexx88 · November 5th, 2006, 10:14 PM

why would this start after the head gasket replacement could loose wire connectors do that. it cranks 2 times then the tach needle drops below the numbers

stang fanatic · November 5th, 2006, 10:21 PM

sounds like typical ground or loose wire issues...

terribleonexx88 · November 5th, 2006, 10:39 PM

the orange wire and ground that bolts to the back of the drivers side head wasnt attached til 2day but the bolt and rings on the end of the wires where crapped up so 2morro ill try cleaning them up, the alternator looks fairly new

terribleonexx88 · November 6th, 2006, 02:37 PM

i didnt clean that bolt or wire and i got in it 2day and it started right up (so excited i stalled it lol) so im wilin to bet it was just that orange wire that wasnt grounded to the head. also i notice a squeal or or squeak under high rpms could that be the serpentine belt. im running the 84.5 belt eliminating the smog pump

November 4th, 2006, 10:37 PM	#1
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	Electrical Problem i just got my 88 5.0 back together from changing the head gaskets it started right up first time and i adjusted the timing the beast i could and was on my way. the next day it was struggling to start then a couple days later(today) i got a timing light to do the timing right but the after adjusting the distributer it didnt have any juice to crank it over so we jumped it and it started right up drove for a soild 20min thinkin the alternator would charge it right up and went home turn it off let it sit for a minute then turned the key it cranked but had no juice. jumped it again let it idle for a while then 15 min of idling the rpm dropped so i revved it up and it was fine . shut it off after 25min of idling then tried to start it and yet again cranked but not enough to start it.... any ideas __________________ 85 svo. work in progress

November 5th, 2006, 08:02 AM	#2
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	Sounds like the Alt. isn't charging. Check the Grounds on the back of the Head and make sure they are connected. Considering the Heads were just off. Also make sure all the wires are connected goot to the Alt. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

November 5th, 2006, 10:54 AM	#3
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	i looked behind the heads and near the driver side theres an orange wire with a metal ring on the end and a braided ground with a ring on the end of that, ill go screw those in the back of the head now thanks __________________ 85 svo. work in progress

November 5th, 2006, 11:34 AM	#4
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	how long a drive will fully charge the battery __________________ 85 svo. work in progress

November 5th, 2006, 12:15 PM	#5
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	Usually about 30 minutes to 1 hour of driving. Is it charging now? It would be better to charge with a battery charger if you can find one. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

November 5th, 2006, 04:53 PM	#6
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	i drove around the the block a couple times and it didnt really do anything but the volt meter read a little higher, ill ask around for a batt. charger __________________ 85 svo. work in progress

November 5th, 2006, 06:57 PM	#7
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	battery may justbe going bad and wont hold charge long after shutdown. need to load test batt and alternator..if all ok, disconnect ground at battery and put a test light between the batt post and cable, if it lights up bright, then something is drawing too much voltage __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

November 5th, 2006, 09:17 PM	#8
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	i tested the voltage with a meter it read 12.7 __________________ 85 svo. work in progress

November 5th, 2006, 09:29 PM	#9
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	an alternator can put out 12 volts, but when its rated for say 100 amps, and its only putting out 60 amps...the battery never gets enough of a charge to last. Alternators that put out less than 15% of their rating are considered bad and need to be repaired or replaced __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

November 5th, 2006, 10:14 PM	#10
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	why would this start after the head gasket replacement could loose wire connectors do that. it cranks 2 times then the tach needle drops below the numbers __________________ 85 svo. work in progress

November 5th, 2006, 10:21 PM	#11
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	sounds like typical ground or loose wire issues... __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

November 5th, 2006, 10:39 PM	#12
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	the orange wire and ground that bolts to the back of the drivers side head wasnt attached til 2day but the bolt and rings on the end of the wires where crapped up so 2morro ill try cleaning them up, the alternator looks fairly new __________________ 85 svo. work in progress

November 6th, 2006, 02:37 PM	#13
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	i didnt clean that bolt or wire and i got in it 2day and it started right up (so excited i stalled it lol) so im wilin to bet it was just that orange wire that wasnt grounded to the head. also i notice a squeal or or squeak under high rpms could that be the serpentine belt. im running the 84.5 belt eliminating the smog pump __________________ 85 svo. work in progress

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