Marcel67 Posted September 24, 2013 Share Posted September 24, 2013 My MH E9 start to having issues starting. I replaced the ignition switch in the dash,but still have no luck getting it started. I check the following:Checked terminal connections on batteries. have power all batteries are in good shapeChecked starter motor, when bridged the poles on the starter directly it will spin but NOT engage the flywheelI think its a loose wire because two times the truck will start when wiggling the key ignition. However i do not have any luck since know its not doing any thing.HELLPPPPP I'm not a mechanic by trade so any advice is welcome. Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/ Share on other sites More sharing options...
Superdog Posted September 24, 2013 Share Posted September 24, 2013 Theres a junction block and relay on the shift tower that's a known trouble spot on the MH's,might be there. Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208220 Share on other sites More sharing options...
countryboy5487 Posted September 24, 2013 Share Posted September 24, 2013 Find your starter solenoid (looks just like one for a older ford pickup) on a r/dm their on the firewall but on a mh im not sure where its mounted. Take a screwdriver and jump between the battery hot post and the post with the little wire from the key switch. If she fires right up your promblim is most likely either key switch is going bad, connection on the back of the switch going to the solenoid, or the solenoid connection. If you jump it over and it wont start but you can jump between the two big posts on the solenoid ( gonna need two screwdrivers or pliers with coated handles) and she fires up then your solenoid is likely bad. Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208222 Share on other sites More sharing options...
39 Baby Mack Posted September 24, 2013 Share Posted September 24, 2013 On the later "MH"'s they did away with the junction box on the shift tower,I believe you'll find the starter solenoid under the dash on the L.H. side between the steering column and the dog box.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208225 Share on other sites More sharing options...
Superdog Posted September 24, 2013 Share Posted September 24, 2013 On the later "MH"'s they did away with the junction box on the shift tower,I believe you'll find the starter solenoid under the dash on the L.H. side between the steering column and the dog box.RonI could see why they did Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208227 Share on other sites More sharing options...
rw613 Posted September 24, 2013 Share Posted September 24, 2013 my 91 mh still has the parlell switch on the shift tower that very well could be a problem Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208230 Share on other sites More sharing options...
Marcel67 Posted September 24, 2013 Author Share Posted September 24, 2013 Ok I check to terminal switches at the fuse box at the passenger site. When you turn the switch it make a clicking sound and have power.is there a starter solenoid under the dash on the driver site as well? Spoke with barry today real ice helpful guy. Put me with the mechanic told me also to check the harness coming out of the cab driver site. There is a connection plug he told me to check.I will keep trouble shooting and asking questions if stock will report tomorrow my findings. Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208240 Share on other sites More sharing options...
39 Baby Mack Posted September 24, 2013 Share Posted September 24, 2013 Yes there is a starter solenoid under the dash on the drivers side.Should have a plastic flap around it.The relay over in the fuse box that you hear clicking is the power relay.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208241 Share on other sites More sharing options...
Marcel67 Posted September 24, 2013 Author Share Posted September 24, 2013 Ok thanks Ron, will get initial in the morning will let you guys I my outcome. Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208269 Share on other sites More sharing options...
slpwlker Posted September 25, 2013 Share Posted September 25, 2013 If it is clicking it could also be the starter. Might try having someone tap on it with a hammer and attempt to start it. Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208271 Share on other sites More sharing options...
Marcel67 Posted September 25, 2013 Author Share Posted September 25, 2013 Sleepy we tried that as well no luck. The starter was replaced 2 years ago, but will try again tomorrow. How is our truck doing? IOU want to pull in the shop when back in Florida let me know. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208279 Share on other sites More sharing options...
Marcel67 Posted September 25, 2013 Author Share Posted September 25, 2013 Ron do you have a picture or schematic on the location of the starter solenoid? Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208379 Share on other sites More sharing options...
Marcel67 Posted September 25, 2013 Author Share Posted September 25, 2013 We located the solenoid under the cab on the drivers site in a black plastic box. One cable was loose on the top solenoid and if we bridge the bottom solenoid the truck fores wright up. I will replace them both at this time since the housing cover on to top one is loose. also will clean it up since there is a lot of dirt in the box. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208389 Share on other sites More sharing options...
j hancock Posted September 25, 2013 Share Posted September 25, 2013 That is some good look grunge and filth buildup! Bonus is the broken wire.A little dab of dielectric grease on your connection might not be a bad idea. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208396 Share on other sites More sharing options...
Marcel67 Posted September 25, 2013 Author Share Posted September 25, 2013 Well i bought two new solenoids and have new cable made to bridge them. So i hope this will be the fix!! Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208403 Share on other sites More sharing options...
39 Baby Mack Posted September 25, 2013 Share Posted September 25, 2013 We located the solenoid under the cab on the drivers site in a black plastic box. One cable was loose on the top solenoid and if we bridge the bottom solenoid the truck fores wright up. I will replace them both at this time since the housing cover on to top one is loose. also will clean it up since there is a lot of dirt in the box. photo.JPGSorry to steer you in the wrong direction, that's the junction box Mike and rw613 were talking about.It was mounted on the gear shift tower.Somewhere on here I thought i saw that it was a '93 and our last two MH's which were '93's had the starter solenoid up in the cab and no junction box on the shift tower!Sorry wasn't trying to make things confusing!In the junction box on your truck there is a solenoid for the starter and the other thing should be a heavy duty circuit breaker. I don't remember for sure what the rating was for the breaker but it was pretty high and was marked on the reset knob coming out of the other side of the junction box. It had to be manually reset if it was tripped.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208434 Share on other sites More sharing options...
Marcel67 Posted September 25, 2013 Author Share Posted September 25, 2013 Ron,no problem I have learned a lot the last couple days and apriciate al help a received from you guys. Even the boys off watts where lost. When we tilted the cab forward we noticed the box. I bought both so will install it in the morning. You guys are all great people out there that are willing to help or give advice. My next task will be the a/c unit to get it back working again.Keep you posted on my endeavor Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208438 Share on other sites More sharing options...
farmer52 Posted September 25, 2013 Share Posted September 25, 2013 We located the solenoid under the cab on the drivers site in a black plastic box. One cable was loose on the top solenoid and if we bridge the bottom solenoid the truck fores wright up. I will replace them both at this time since the housing cover on to top one is loose. also will clean it up since there is a lot of dirt in the box. photo.JPGMaybe I should "open the box" on the MH and take a look inside. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208439 Share on other sites More sharing options...
39 Baby Mack Posted September 25, 2013 Share Posted September 25, 2013 MarcelWhat year is your "MH"?Ron Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208440 Share on other sites More sharing options...
Marcel67 Posted September 26, 2013 Author Share Posted September 26, 2013 My MH is from 1993 Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208442 Share on other sites More sharing options...
Marcel67 Posted September 26, 2013 Author Share Posted September 26, 2013 Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208443 Share on other sites More sharing options...
39 Baby Mack Posted September 26, 2013 Share Posted September 26, 2013 That's what I thought.Our '93's didn't have the boxes, must have been a mid year change?Ron Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208446 Share on other sites More sharing options...
Marcel67 Posted September 26, 2013 Author Share Posted September 26, 2013 Ron was yours a e9 V8 as well? Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208447 Share on other sites More sharing options...
39 Baby Mack Posted September 26, 2013 Share Posted September 26, 2013 No our 93 "MH"'s were E7-300's but I don't see where that would make a difference?We had 2 '85 "MH"'s with EM6-300's and 2 '87 "MH"'s with E6-300's and they all had the boxes on them like yours.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208450 Share on other sites More sharing options...
Marcel67 Posted September 26, 2013 Author Share Posted September 26, 2013 Now I know the location after cleaning I follow hancock's advice by putting some electrical grease Quote Link to comment https://www.bigmacktrucks.com/topic/32906-mh-e9-starting-problems/#findComment-208451 Share on other sites More sharing options...
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