Mine looks like Diezel_Cowboy's, except his looks washed, waxed, buffed & shined compared to mine
Well I don't know what everybody else thinks, but on my 7.3 controller thingie....I clipped that controller black ground wire that's about 4-5" long that goes down & grounds under/thru the bolt that holds the controller in place.
These 7.3 controller thingie works by closing/conecting the ground anyway. I clipped, spliced, then ran wire up to, & thru my pushbutton switch, then just find a good ground past the pushbutton.
Works great....turn key on, pushie the button, count 6-8-9, hit starter.....smoke & roll!!!
Had mine redone for 2+yr & no glowplug changing....before that new set every 6-8-10mo.
If it's real cold I may turn key off 2-3-4 seconds, then do it again.
If the key is on & I'm pushing button, & it warm enough to not need all 7-8-9 count, it'll kick off & start cycling on it's own till I release button. Works just like it used to before I got to cutting & splicing.....except now it doesn't keep cycling & wear out glowplugs.
& yes, 1 plug out= hard to start, 2 plugs out= nearer to impossible to start, 3 plugs out you better get the canned glowplugs out & start spraying.....about then rolling down a big hill helps too
On edit....now that I think things over, I don't know why I bought that big handfull of ZD9's while back...these'll last till I'm gone!!!