Gary Lewis Posted February 7, 2018 Share Posted February 7, 2018 I found something in the catalog today that has me puzzled, so perhaps y'all can explain it to me. As you can see below, the catalog says that 1980 - 86 trucks with a "single fuel system" take tank selector switch D5TZ 9A050-A, which is marked D5TB 9A050-AA and has 5 terminals. I just so happen to have one of those rascals and can tell you that it takes a different connector than all of the other tank selector switches, which have a 6-pin layout. (By the way, I have a page up that shows the various switches used on these trucks: Fuel Systems/Fuel System Wiring.) I've gone to the EVTM's and am now even more confused. The 1981, 1884, and 1984 EVTM's show a 5-pin terminal that can only fit the D5TZ 9A050-A, and it isn't until the 1986 EVTM that the 6-pin layout appears. However, the catalog shows that a 6-pin format was used as early as '83. But none of the EVTM's show a switch on single-tank trucks, only show a switch for trucks with dual tanks. What am I missing? Why do trucks with only one tank need a switch? And, did they have one? Any of y'all have a single-tank truck? Does it have a switch? Or, does "single fuel system" mean that they only run on a single fuel and not, say, gasoline and LPG? Link to comment Share on other sites More sharing options...
85lebaront2 Posted February 7, 2018 Share Posted February 7, 2018 Very likely, Ford and and Chrysler were all offering LP gas options for trucks. We had a father in our scout troop who would loan us a GMC pickup with the 305 V6 and 4 speed Hydra-Matic that ran on LP gas. Link to comment Share on other sites More sharing options...
reamer Posted February 8, 2018 Share Posted February 8, 2018 Very likely, Ford and and Chrysler were all offering LP gas options for trucks. We had a father in our scout troop who would loan us a GMC pickup with the 305 V6 and 4 speed Hydra-Matic that ran on LP gas. No tank switch on my single-tank flareside... Link to comment Share on other sites More sharing options...
FuzzFace2 Posted February 8, 2018 Share Posted February 8, 2018 No tank switch on my single-tank flareside... Same here on my 81 F100 single-tank flare side.............till I added the 2nd rear tank Dave ---- Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 8, 2018 Author Share Posted February 8, 2018 No tank switch on my single-tank flareside... Same here on my 81 F100 single-tank flare side.............till I added the 2nd rear tank Dave ---- I think "single fuel" must not mean "tank" and instead means it wasn't set up for more than one fuel. Link to comment Share on other sites More sharing options...
Dyn Blin Posted February 13, 2018 Share Posted February 13, 2018 No tank switch on my single-tank flareside... Same here on my 81 F100 single-tank flare side.............till I added the 2nd rear tank Dave ---- Hey Fuzz, do you have a write up on your 2nd tank addition somewhere? Thanks Link to comment Share on other sites More sharing options...
Recommended Posts