CocoSr Posted March 3, 2021 Share Posted March 3, 2021 Hello , My 2008 Mack has a 150 amp fuse/relay w red wire that goes to who knows where I can’t tell , the truck completely dies, lights engine , everything! When this happens I have to wait a minute or so when it clicks I can press the button and it comes back; Very dangerous. Any ideas ? Thanks in advance. Quote Link to comment https://www.bigmacktrucks.com/topic/66122-150-amp-fuserelay/ Share on other sites More sharing options...
Mackpro Posted March 4, 2021 Share Posted March 4, 2021 It’s for your cab power. They do go bad . Mack later changed the set up to a large fuse instead of the breaker style you have . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66122-150-amp-fuserelay/#findComment-469945 Share on other sites More sharing options...
CocoSr Posted March 4, 2021 Author Share Posted March 4, 2021 I appreciate it ! Thank You! Will replace right away. Quote Link to comment https://www.bigmacktrucks.com/topic/66122-150-amp-fuserelay/#findComment-469946 Share on other sites More sharing options...
CocoSr Posted March 11, 2021 Author Share Posted March 11, 2021 I saw the one Mack offered, I didn’t buy it cuz I can’t reset it ... can’t find the same one anywhere, Has anyone bypassed theirs ? Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/66122-150-amp-fuserelay/#findComment-470376 Share on other sites More sharing options...
Polarhound Posted March 18, 2021 Share Posted March 18, 2021 (edited) Bypassing it is not recommended. If it's blowing and you are not 479% certain that it is not a bad breaker, you risk sending the entire truck up in flames. The breaker you are looking for to replace yours looks to be part number 21301448. Mack has 261 of them at their PDCs. This should automatically reset as opposed to hitting the button. If you want one with a button, look at a Bussman CB185 series breaker. You can find the 150A breaker, with a reset button on it, at Grainger under item# 6CJA2, Bussman part number CB185-150. Edited March 18, 2021 by Polarhound 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66122-150-amp-fuserelay/#findComment-470960 Share on other sites More sharing options...
CocoSr Posted March 23, 2021 Author Share Posted March 23, 2021 Thank You! Super helpful info Quote Link to comment https://www.bigmacktrucks.com/topic/66122-150-amp-fuserelay/#findComment-471306 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.