2wdiesel2021 Posted August 25 Share Posted August 25 I am working on a 2010 CHU613 with an MP8. I got the truck and the dash would come on with the key but it wouldn’t crank with the key but I could jump the starter and it would crank but still not start. I have fuel pressure. I started looking into electrical and now the dash only comes on when ai turn the key all the way forward then turns off when I go back to the Run position. New batteries. when I pull the relay in the dash cab PWR i believe it says the dash comes on and then 5 seconds it resets and keeps doing it. The pre ems relay is the one clicking on and off. Where do I need to go to resolve this? what usually causes something like this? Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/ Share on other sites More sharing options...
Joey Mack Posted August 25 Share Posted August 25 did the fused link in the battery box fail? Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557604 Share on other sites More sharing options...
2wdiesel2021 Posted August 25 Author Share Posted August 25 I saw it there and I bypassed it. I got the truck with no batteries in it. It looked like the fuseable link was on the ground side of things. Does that seem correct? Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557616 Share on other sites More sharing options...
Joey Mack Posted August 25 Share Posted August 25 yes it is, Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557617 Share on other sites More sharing options...
2wdiesel2021 Posted August 25 Author Share Posted August 25 well then it’s good, so I am at a loss here. The ignition constant on the key switch has 12v until I turn it to the on position and all the wires for to 3ish volts like everything loses power. Turn the key back to off and the main feed to the ignition gets 12v back. Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557618 Share on other sites More sharing options...
Joey Mack Posted August 26 Share Posted August 26 I dont know if I can help you.. Ive been away from those Volvo's for a while now.. have you pulled any relays inside the top of the dash to see if anything changes? what were the most recent repairs? new starter?? Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557619 Share on other sites More sharing options...
2wdiesel2021 Posted August 26 Author Share Posted August 26 new starter yes sir, we pulled one relay that says pwr PT and then we get the on off over and over. when that really is put back then nothing works. The pwr ems relay is the one clicking on and off. the starter will not crank unless we jump it. Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557626 Share on other sites More sharing options...
Joey Mack Posted August 26 Share Posted August 26 M-drive tranny ? Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557632 Share on other sites More sharing options...
2wdiesel2021 Posted August 26 Author Share Posted August 26 no sir 10 speed Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557638 Share on other sites More sharing options...
Joey Mack Posted August 26 Share Posted August 26 Great.. less involvment. Im afraid this is bigger than me. I have lost a lot of knowledgenon them over the years.. maybe Mack pro will see this thread.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74495-2010-chu-613-cab-power-goes-on-and-off/#findComment-557639 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.