msbulldog601 Posted March 15, 2023 Share Posted March 15, 2023 I have a starting issue with my 99 Mack Ch613. I worked Saturday came back Monday night to start it up I got nothing it’s little cold here in Mississippi so I said it must be the batteries I will wait until the morning. Morning came around went to the truck it started to turn over but slow. I went got new batteries and changed out the starter relays with everything in place I get no lights on the dash when I turn the key forward but the engine turn over no start and I also hear a little noise like it’s coming from the dash after a few seconds when the key is tuned forward. I wish I could describe the noise I guess it’s like a little whistle noise. Can anyone point me In the right direction with this issue. You can see the two relay/solenoids I replaced in the pictures thanks again. Quote Link to comment Share on other sites More sharing options...
Solution fjh Posted March 15, 2023 Solution Share Posted March 15, 2023 I suspect the relay picture one is the culprit! picture two is the start relay! picture two looks to be the accessory relay ! That one controls everything for the dash the heater fan etc ! There are two different versions of that cole hearsay relay Constant duty and periotic duty! Be sure you have the right solenoid ! Check for power on both sides should be power one side on the big wires and power on both when the key is turned on! also the small terminals should be power to one and ground to the other! Check power on the one side and Make sure you got ground on the other! 1 Quote Link to comment Share on other sites More sharing options...
msbulldog601 Posted March 15, 2023 Author Share Posted March 15, 2023 38 minutes ago, fjh said: I suspect the relay picture one is the culprit! picture two is the start relay! picture two looks to be the accessory relay ! That one controls everything for the dash the heater fan etc ! There are two different versions of that cole hearsay relay Constant duty and periotic duty! Be sure you have the right solenoid ! Check for power on both sides should be power one side on the big wires and power on both when the key is turned on! also the small terminals should be power to one and ground to the other! Check power on the one side and Make sure you got ground on the other! Thank you so much for great explanation I will go to the truck and see what I come up with and report back thanks again have a blessed day! Quote Link to comment Share on other sites More sharing options...
msbulldog601 Posted March 15, 2023 Author Share Posted March 15, 2023 3 hours ago, fjh said: I suspect the relay picture one is the culprit! picture two is the start relay! picture two looks to be the accessory relay ! That one controls everything for the dash the heater fan etc ! There are two different versions of that cole hearsay relay Constant duty and periotic duty! Be sure you have the right solenoid ! Check for power on both sides should be power one side on the big wires and power on both when the key is turned on! also the small terminals should be power to one and ground to the other! Check power on the one side and Make sure you got ground on the other! Hey I put the old solenoid back and turned the switch forward lights came on and truck fired right up thanks again!!! 1 Quote Link to comment Share on other sites More sharing options...
fjh Posted March 15, 2023 Share Posted March 15, 2023 Good to hear!😇 Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted March 15, 2023 Share Posted March 15, 2023 always good to hear updates especially when they are positive. thanks Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 15, 2023 Share Posted March 15, 2023 I 'third' the motion... jojo Quote Link to comment Share on other sites More sharing options...
msbulldog601 Posted March 15, 2023 Author Share Posted March 15, 2023 1 hour ago, mechohaulic said: always good to hear updates especially when they are positive. thanks Yessir thank you all!!! Quote Link to comment Share on other sites More sharing options...
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