ofrisco_89 Posted September 12, 2013 Report Share Posted September 12, 2013 my 620s giving me alternator issues such a pita. Quote Link to comment
Aibast Posted September 12, 2013 Report Share Posted September 12, 2013 mine had a loose wire on the inside. Open the alternator and take a look. You also can also lube the bearing when you do this. Quote Link to comment
datzenmike Posted September 12, 2013 Report Share Posted September 12, 2013 my 620s giving me alternator issues such a pita. C'mon noob, you can do better than this.... I can only assume you are asking for help? It tells us nothing. If you went to a doctor with a problem would you just say that. diagnosis must be made taking all symtoms into account. You first should have checked the following. If not do so and report what you HAVE done. Have you checked the belt tension? Is water or oil leaking onto the alternator? Did you check to see if the plastic pluginto the alternator is firmly IN? Hae you cleaned your battery cables? Have you checked the positive cble on the starter is clean and tight? Have you checked the ground wire on the head is clean and tight. Is there a good solid gtound between the motor or the negative to the body sheet metal. In other words a good ground return to battery? What do you know about this? Was it ever working properly and then just started not working? Did it slowly go bad or suddenly? What exactly it it doing? Has your truck been messed with as far as wiring... that you know of? 2 Quote Link to comment
lilhslr Posted September 12, 2013 Report Share Posted September 12, 2013 I was having issues with mine when I first got it. Didn't take long to figure out that the seals on the mechanical fuel pump were in bad shape and that caused fuel/oil to leak. The alternator on my 74 is pretty much right under the fuel pump. After fixing the fuel pump (just replaced it), it's been great since. Also greatly reduced the puddles I was leaving all over town. Quote Link to comment
ofrisco_89 Posted September 13, 2013 Author Report Share Posted September 13, 2013 C'mon noob, you can do better than this.... I can only assume you are asking for help? It tells us nothing. If you went to a doctor with a problem would you just say that. diagnosis must be made taking all symtoms into account. You first should have checked the following. If not do so and report what you HAVE done. Have you checked the belt tension? Is water or oil leaking onto the alternator? Did you check to see if the plastic pluginto the alternator is firmly IN? Hae you cleaned your battery cables? Have you checked the positive cble on the starter is clean and tight? Have you checked the ground wire on the head is clean and tight. Is there a good solid gtound between the motor or the negative to the body sheet metal. In other words a good ground return to battery? What do you know about this? Was it ever working properly and then just started not working? Did it slowly go bad or suddenly? What exactly it it doing? Has your truck been messed with as far as wiring... that you know of? well actually i purchased a new alternator along with new cables for the battery, starter and deloomed the electrical tape to look for anything. i also went ahead and changed all the dashboard light bulbs and glass fuses. i ended up getting the car to run but now the charge light stays on and the car cuts off randomly im still going at this i wasn't really asking for help just stated how much of a pita it is. :) the battery/alternator wires have been messed with im currently looking on the forum for a wiring diagram the one thats pinned in electrical for a 78 pickup doesn't work just gotta keep looking i know its here. Quote Link to comment
ofrisco_89 Posted September 13, 2013 Author Report Share Posted September 13, 2013 well actually i purchased a new alternator along with new cables for the battery, starter and deloomed the electrical tape to look for anything. i also went ahead and changed all the dashboard light bulbs and glass fuses. i ended up getting the car to run but now the charge light stays on and the car cuts off randomly im still going at this i wasn't really asking for help just stated how much of a pita it is. :) the battery/alternator wires have been messed with im currently looking on the forum for a wiring diagram the one thats pinned in electrical for a 78 pickup doesn't work just gotta keep looking i know its here. might i add its at 13.7volts Quote Link to comment
jwerty1 Posted September 14, 2013 Report Share Posted September 14, 2013 fix the charge light Quote Link to comment
ofrisco_89 Posted September 14, 2013 Author Report Share Posted September 14, 2013 fix the charge light changed it along with every dash board light with 161 bulbs. the hazard lights work but not the turn signals along with gas and temp gauge don't work. im about to borrow my friends multimeter and follow wires. urghhhhhhhh i wont let it defeat me Quote Link to comment
datzenmike Posted September 14, 2013 Report Share Posted September 14, 2013 Random replacement of parts is a waste of money. Did you keep your original alternator? Because it's likely fine and ten times better than any rebuilt or re manufactured piece of shit out there. Half the replacement alts are 'bad in the box' and a lifetime warranty is useless when you're marooned on the side of the road 20 miles from home on your sixth 'free' alternator. Get a $5 test lamp to follow voltage or test for grounds. Look on or near the positive battery post, you'll see a short length green wire with plastic plugs at each end, plugged in line going into the engine room harness. This is the fusible link . Inspect it for damage. It may look ok on the outside but be melted inside. might i add its at 13.7volts . This is close to proper charge rate, can go as high as 14.5 fix the charge light . This isn't much help. Quote Link to comment
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