DragCat Posted August 24, 2020 Share Posted August 24, 2020 Ok, i'm wondering when the brake light in the instrument panel is supposed to light up. Currently it lights up when the parking brake is engaged so I know the bulb is good lol. And I see a wire going from the proportioning valve to the firewall. I just installed roll control / line loc (which works great) and my buddy thinks the light should be on when I engage the line loc and only the front brakes are on. At least thats how it is on his 69 Camaro. Quote Link to comment Share on other sites More sharing options...
1970mcss Posted August 24, 2020 Share Posted August 24, 2020 I believe it is only to warn when the park brake is engaged. 1 Quote Link to comment Share on other sites More sharing options...
DragCat Posted August 24, 2020 Author Share Posted August 24, 2020 Thanks Paul, I did install the red bulb that came with the kit, kind of just a visual verification point I guess since ya gotta keep the button depressed for the line loc. 1 Quote Link to comment Share on other sites More sharing options...
jft69z Posted August 24, 2020 Share Posted August 24, 2020 The dash brake light should also light up if you lose either the front or rear brakes due to a line burst or something like that. That's why the wire is on the proportioning valve, it's a switch that'll move if one side is lost. It'll provide a ground path to light up the light, just like pressing the park brake also grounds that circuit. 1 Quote Link to comment Share on other sites More sharing options...
DragCat Posted August 24, 2020 Author Share Posted August 24, 2020 35 minutes ago, jft69z said: The dash brake light should also light up if you lose either the front or rear brakes due to a line burst or something like that. That's why the wire is on the proportioning valve, it's a switch that'll move if one side is lost. It'll provide a ground path to light up the light, just like pressing the park brake also grounds that circuit. Ok. i'll have to look into that then...obviously I don't know if it ever worked lol. I thought maybe the line loc solenoid was confusing the proportioning valve signal. Quote Link to comment Share on other sites More sharing options...
jft69z Posted August 24, 2020 Share Posted August 24, 2020 5 minutes ago, DragCat said: Ok. i'll have to look into that then...obviously I don't know if it ever worked lol. I thought maybe the line loc solenoid was confusing the proportioning valve signal. It's possible, not sure about the line loc & how that would affect it. I guess it depends on where the solenoid is inserted into the system and how the prop valve sees the imbalance. Never installed or used one. Next time you're at the track, look around maybe, see what the other guys say? Quote Link to comment Share on other sites More sharing options...
DragCat Posted August 24, 2020 Author Share Posted August 24, 2020 3 minutes ago, jft69z said: It's possible, not sure about the line loc & how that would affect it. I guess it depends on where the solenoid is inserted into the system and how the prop valve sees the imbalance. Never installed or used one. Next time you're at the track, look around maybe, see what the other guys say? Laughing, yea in theory it could go either way. My buddy's 69 Camaro it does make the brake light come on when the line loc is engaged, front brakes on back brakes off. I'll have to text a friend that races a first gen and see if he has line loc and if it lights the light, or if he even cares lol Quote Link to comment Share on other sites More sharing options...
DragCat Posted August 25, 2020 Author Share Posted August 25, 2020 I did text a friend that races a first gen and has line loc, he said his light doesn't illuminate with line loc engaged. I'm going to look into it but i'm not putting it on my priority list lol 1 Quote Link to comment Share on other sites More sharing options...
1970mcss Posted August 25, 2020 Share Posted August 25, 2020 4 hours ago, jft69z said: The dash brake light should also light up if you lose either the front or rear brakes due to a line burst or something like that. That's why the wire is on the proportioning valve, it's a switch that'll move if one side is lost. It'll provide a ground path to light up the light, just like pressing the park brake also grounds that circuit. I didn't think of that, good to know, thanks 1 Quote Link to comment Share on other sites More sharing options...
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