electric pain, no start 200tdi - Page 2 - Defender Source
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  #21  
Old August 21st, 2016, 11:51 AM
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What amp alternator did you purchase. Light on until you rev it a tad is normal. I recall reading that the smaller alternators really make no juice below 1200 rpm. The smaller 45 and 65 amp alternators really need higher rpm to recharge the amperage used to start the truck.
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  #22  
Old August 21st, 2016, 11:52 AM
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Bad engine ground?
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  #23  
Old August 21st, 2016, 12:14 PM
tzbmcp
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65 amp. Concerned 1. that I'm seeing voltage decrease, although slow. 2. Voltage should be in the 14v range with car running, and I'm in the 12.2v range.
Thanks
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  #24  
Old August 21st, 2016, 12:22 PM
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You are seeing that voltage @ what rpm ? Idle isn't going to get the job done. The military radio trucks had hand throttles for that reason.
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  #25  
Old August 21st, 2016, 12:39 PM
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I don't have a tach . Still think I should be seeing the 14v range at least under increased rpms but I don't. can mash on the pedal but only get up to 12.9v.

Checked cleaned and replaced ground strap from battery.

Not sure where engine ground strap located. Thought near engine mount but not there. Ideas?
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  #26  
Old August 21st, 2016, 01:05 PM
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Quote:
Originally Posted by tzbmcp View Post
Update - new alternator (from RN) installed. new capacitor, belt tight and in good shape, Battery light illuminates when turning the key (did not before). Starts up right away. Great.

Problem partially solved as I now have a running truck, only the battery charge light stays bright until I give it gas, then goes out. Drove to gas station and back, to work and back, no problem.

At home:
Hooked up multimeter (pos to pos batt terminal, neg to neg battery terminal) 12.2 volts not running, no key. Immediately after starting at idle - 11.74 volts and battery light on (same reading when hook up meter from Alternator post with large brown wire to neg on battery). Hook up meter again to batt terminals. Watch for a minute, slowly drops to 11.71. After 5 minutes, down to 11.50 and battery light on.

Rev engine. up to 12.23 volts, battery light off. Slow voltage decrease over a few minutes to 12.11.


Believe it should be around 14.5 while running, 12.7 not running correct?

Seems like the the alternator is putting out charge, just not enough. Belt is tight, alternator is turning. Visually wires look to be in good shape. Connections at back of alternator are tight, sanded and clean. Not sure what else to do. Need some ideas to look next.

Thanks
Sounds normal thus far.
What voltage do you get when you rev the engine up.
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  #27  
Old August 21st, 2016, 01:09 PM
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12.9v with pedal mashed.
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  #28  
Old August 21st, 2016, 01:46 PM
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First get the battery load tested.

Then look at the wiring. You probably have a bad connection somewhere. I would first look at where the alternator wire connects to the starter.
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  #29  
Old August 21st, 2016, 06:15 PM
tzbmcp
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Assuming battery will pass load test (its new), any helpful hints on getting to the starter on defender 200 tdi? Looks like Ill have to move a whole bunch of stuff to get to the wires that look to be on top, and way out of the way. Can't see any fittings from any angle.
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  #30  
Old August 21st, 2016, 06:35 PM
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On a Defender 200tdi, it's pretty easy.

Disconnect all electrical wires from the starter.

On the left side of the truck, reach down under the downpipe, and undo the nut and the bolt. There is one other bolt on the topside of the bellhousing. I believe the nut needs a 15mm spanner while the bolts require 13mm spanners.

Once the starter is free, pull the starter out, then, holding the rear of the starter, let the nose drop down. Pull the starter around the downpipe and out the top of the engine bay, rear-end first.

Watch out, it's heavy.
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  #31  
Old August 21st, 2016, 06:44 PM
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I think he just wants to check the wires. You can get in there. It is mostly by feel.

As to removing the starter. If it is right hand drive you can do that. If it is left hand drive something needs to be moved. I'm my experience anyway.
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  #32  
Old August 21st, 2016, 06:50 PM
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Quote:
Originally Posted by Red90 View Post
I think he just wants to check the wires. You can get in there. It is mostly by feel.

As to removing the starter. If it is right hand drive you can do that. If it is left hand drive something needs to be moved. I'm my experience anyway.
good point!

The starter wires are connected to the solenoid, which is at the very top of the starter, about 4 inches from the rear of the starter. There's the +12V hot wire and the solenoid starter wire.
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  #33  
Old August 21st, 2016, 07:53 PM
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Robert Davis
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Quote:
Originally Posted by tzbmcp View Post
12.9v with pedal mashed.
You should read about 14+
You probably have a drain.
Check to make sure the field wire is not shorted in with the brown wire.
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UD: "Just Power through it man!"
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  #34  
Old August 21st, 2016, 08:00 PM
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Quote:
Originally Posted by tzbmcp View Post
Rev engine. up to 12.23 volts, battery light off. Slow voltage decrease over a few minutes to 12.11.
FWIW my truck does the rev up light off as well. I do agree though that it probably isn't right, just common.
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