98 k1500 starting problem

[98CHEVYK1500]

My truck always starts when cold. When I drive it for a while (15 min+) shut it off and try to start it after about 15 min. sometimes it won't start. And I mean doesn't even turn over. nothing. this is very intermittent...battery is good, connections are good...truck has 105,000 miles on it. heard about the starter relay switch...where is that? any suggestions???

[skipr]

Starter relay is the solinoid (part of the stater itself) fords have a seperate relay. You have same symtoms my 68 SS396 El Camino had. You may find this unlikely but it's true. The battery cable (+) goes directly to solinoid , but the 5 or 6 inches that pass close to exhaust got so hot over time the copper lost it's conductive properties and turned into a tungsten type of resistor. I cut the 5 inch section out of cable and ohm tested the two peices (with the cut piece out of the picture) 0 hm's. with the test before I cut it was 800,000 ohms. I never would hav found it . A GM engineer lived across the street and had metioned it, I said (to myself) whats this guy on? Then tried for the hell of it.