So im stil trying to figure out why my truck cuts out on the highway. Somebody mentioned that it might be the ballast resistor. So I looked, and even with help from Haynes, i couldnt find the damned thing. Ive got a 91, 318 TBI. Anybody able to give me a general area (back right or back left or something) or maybe even a picture?

Also, the voltage to my coil is 13 on one side - which is within the 1 volt of battery level suggested. But the negative terminal reads under 11, about 10.5-10.75. Any ideas?

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'91 D150, standard cab, standard bed
'63 Rambler American 330

On my truck the resistor is on the driver's side, to the right (looking at the grill) of the brake booster and ignition module. I circled it on the picture I attached. Also, the voltage sounds low to me, do a coil resistance test to see if it's ok. You should see around 10.5k ohms between the center and positive and around .7-.8ohms between positive and ground.

[IMG]local://upfiles/87633/1117EE1E5D72483B954C648F6D1477BE.jpg[/IMG]

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1981 D150 5.2L auto
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You should not find one on that new of a truck.
You will need to troubleshoot when that happens(fuel,spark).

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thanks comma thats where i figured it would be, and thanks moparborn for telling me why i didnt see it there...
im going to check the omhs and get back to you. this problem is really starting to get at me.

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'91 D150, standard cab, standard bed
'63 Rambler American 330