Sehka77 Posted January 10, 2021 Share Posted January 10, 2021 (edited) Hello guys , I'm new to the forum ... I recently purchase a 90 Mack Rd690s e6-300hp with 8 speed mack transmission love the truck first Mack ever and wouldn't go back to a Pete ..need some help.. I have wiring issue and fuse panel on passenger side back dont have labels or diagram so have no idea what anything is ? Could not find any other fuse box .. not sure if thats the only one but has nothing but circuit breaker and relays No fuses ?.. also do you guys know of a very good mechanic out here on the west coast?? Thanks for all your help . Also this truck has no leaf spring only solid beam suspension.. anyone know the name and capacity of it ? I thought it was a camelback but again no spring Edited January 10, 2021 by Sehka77 Add Quote Link to comment https://www.bigmacktrucks.com/topic/65492-1990-mack-rd690sfuse-panel-diagramhelphelp/ Share on other sites More sharing options...
LittleMack99 Posted March 11, 2021 Share Posted March 11, 2021 I am fairly positive the suspension system you're referring to is the Walking Beam suspension. As for the wiring diagrams, I'll be waiting here with you lol Quote Link to comment https://www.bigmacktrucks.com/topic/65492-1990-mack-rd690sfuse-panel-diagramhelphelp/#findComment-470447 Share on other sites More sharing options...
Joey Mack Posted March 12, 2021 Share Posted March 12, 2021 (edited) probably 44k... the 4 cap bolts at the trunnion may be 7/8"... I just worked on one last month and now just brainfarted.... Ithink they are 7/8''...jojo Edited March 12, 2021 by Joey Mack More content needed Quote Link to comment https://www.bigmacktrucks.com/topic/65492-1990-mack-rd690sfuse-panel-diagramhelphelp/#findComment-470450 Share on other sites More sharing options...
Sehka77 Posted March 13, 2021 Author Share Posted March 13, 2021 Thanks Joy Mack appreciate it , Quote Link to comment https://www.bigmacktrucks.com/topic/65492-1990-mack-rd690sfuse-panel-diagramhelphelp/#findComment-470537 Share on other sites More sharing options...
Joey Mack Posted March 13, 2021 Share Posted March 13, 2021 👍 Quote Link to comment https://www.bigmacktrucks.com/topic/65492-1990-mack-rd690sfuse-panel-diagramhelphelp/#findComment-470538 Share on other sites More sharing options...
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