SarahJ
Member
- 31
- 3
- 8
- Location
- Bristol, England
I'd like to express my gratitude to the Forum and it’s contributors for all the information that is available. By using the Forum resources I've learned a lot about my Humvee and manged to sort out a problem where it would not start.
I've had my M988 Humvee (6.2l) for about three months now. I had one breakdown in my Humvee a couple of months ago, where everything died whilst driving. After checking everything was plugged in under the dash it started again. I got home and checked the connectors to the Master Switch, a bit dirty so I cleaned them and all seemed to be well.
Now about two weeks ago I went to start my Humvee and nothing, had lights but that was all. I tried checking the Master Switch again, still nothing. When I turned the Master Switch to run, no 'Wait' light came on and the engine wouldn’t turn over. A few people commented it could be the Protective Control Box gone bad.
After reading some great posts on the forum I was getting a good idea what my control box, a Nartron EESS, actually did and with the help of the TM's had a good idea of the wiring as well. I have a bit of electronics experience and being on the 'careful' side with money ( I was brought up in the North of England
) wanted to preclude everything else before purchasing a new EESS/S3 box.
After first disconnecting the batteries, read many warnings about that. I examined the Master Switch connectors again, all seemed fine. Then disconnected the EESS box, the EESS box connectors were nice and clean, the loom engine connector again clean but the loom body connector was slightly oxidized and one pin to the light switch was slightly worse. The body connector was given a good clean with WD40, pipe cleaners and inter-dental brushes. I checked most of the wiring with a multi-meter from the loom body connector and everything was fine. After reading other posts I checked some of the earths and fitted extra earthing leads and gave the battery connectors a really good clean. Connecting back up and still nothing.
Last resort was to make up some test leads with the proper military black rubber shell connectors and also the correct size pin that would fit into the loom body connector. I wanted to use these connectors so I had hands free to flex the cables and connector joints. I just started plugging into the loom connectors that will hook up to the Master Switch, when I thought I must have fitted the wrong size pin as the socket was a lot larger then the pin. Tried the other two Master Switch sockets, one was even bigger and one smaller? Then I realized the sockets had opened up an awful lot, hopefully this was the problem
.
The photograph above shows the three sockets that had opened up, with a new socket on the right for comparison.
Fitted three new military black rubber shell connectors, connected everything up including the battery last. Turned the Master Switch to 'Run', the 'Wait' light came on for a few seconds, tuned to 'Start' and the engine fired up straight away. Joy!
I wouldn't have been able to sort the problem out with out the Forums resources. Many thanks
All I need to do now is sort out the problem with the Alternator periodically over volting.
Sarah
I've had my M988 Humvee (6.2l) for about three months now. I had one breakdown in my Humvee a couple of months ago, where everything died whilst driving. After checking everything was plugged in under the dash it started again. I got home and checked the connectors to the Master Switch, a bit dirty so I cleaned them and all seemed to be well.
Now about two weeks ago I went to start my Humvee and nothing, had lights but that was all. I tried checking the Master Switch again, still nothing. When I turned the Master Switch to run, no 'Wait' light came on and the engine wouldn’t turn over. A few people commented it could be the Protective Control Box gone bad.
After reading some great posts on the forum I was getting a good idea what my control box, a Nartron EESS, actually did and with the help of the TM's had a good idea of the wiring as well. I have a bit of electronics experience and being on the 'careful' side with money ( I was brought up in the North of England
) wanted to preclude everything else before purchasing a new EESS/S3 box.After first disconnecting the batteries, read many warnings about that. I examined the Master Switch connectors again, all seemed fine. Then disconnected the EESS box, the EESS box connectors were nice and clean, the loom engine connector again clean but the loom body connector was slightly oxidized and one pin to the light switch was slightly worse. The body connector was given a good clean with WD40, pipe cleaners and inter-dental brushes. I checked most of the wiring with a multi-meter from the loom body connector and everything was fine. After reading other posts I checked some of the earths and fitted extra earthing leads and gave the battery connectors a really good clean. Connecting back up and still nothing.
Last resort was to make up some test leads with the proper military black rubber shell connectors and also the correct size pin that would fit into the loom body connector. I wanted to use these connectors so I had hands free to flex the cables and connector joints. I just started plugging into the loom connectors that will hook up to the Master Switch, when I thought I must have fitted the wrong size pin as the socket was a lot larger then the pin. Tried the other two Master Switch sockets, one was even bigger and one smaller? Then I realized the sockets had opened up an awful lot, hopefully this was the problem
.The photograph above shows the three sockets that had opened up, with a new socket on the right for comparison.
Fitted three new military black rubber shell connectors, connected everything up including the battery last. Turned the Master Switch to 'Run', the 'Wait' light came on for a few seconds, tuned to 'Start' and the engine fired up straight away. Joy!
I wouldn't have been able to sort the problem out with out the Forums resources. Many thanks
All I need to do now is sort out the problem with the Alternator periodically over volting.
Sarah
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