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02-09-2019
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#1 |
 Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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CHMSL LED mod
I am contemplating Spal fan install this spring and I am hearing, due to heavy amp draw, higher capacity alternator and reducing electric load is advisable. One suggestion made to achieve the latter is to modify CHMSL to LED. In stop and go traffic with foot on the brake, CHMSL represents healthy electrical load is what I was told.
I heard some using Chevy Uplander, Pontiac Mini Van and Olds Silhouette CHMSL (same part) LED strip to work with our Z CHMSL. I ordered Chevy, Pontiac, Olds CHMSL from Ebay for about $60 (of course a Chinese knock-off). https://www.ebay.com/itm/New-Rear-3r...72.m2749.l2649 Once disassembled and laid next to Z CHMSL housing, turns out LED strip out of GM CHMSL is about 1.5" too long.  Hmmm... What to do... I am no electric engineer but careful observation of the circuit board leads me to suspect 4 LED bulbs and a resistor represents one circuit and multiple circuits are connected to the power and ground in parallel. If I remember high school physics class, parallel circuits are such that if I cut excess strip circuits prior to cut should still light up. Time to bite the bullet and try my theory to rest. If I am right - all good. If not - $60. I take a leap of faith (or is it cut of faith) and snap off excess length of the circuit board with a wire cutter. Hook up 9V battery and "dang!" I am right! Time to gut OEM CHMSL and secure LED strip into the housing. Although tough to see, I laid down two layers of 3M double stick on the bottom of red plastic housing to keep LED strip from moving around, temporary 3M strip perpendicular to the strip to hold in place.  Also, attached 1/4" foam on the inside face of CHMSL upper housing so that, once screwed together with red plastic housing, foam will compress and keep the LED strip secure between the top and bottom pieces of the housing. Also used insulated spade connectors so that I can switch the polarity if necessary because LED require correct polarity unlike halogens. End result.  A close up.  Not bad for 2 hours on Saturday morning! 
Last edited by secondchance; 02-09-2019 at 02:39 PM. |
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02-09-2019
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#2 |
Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: CHMSL LED mod
Here is solution I’m going with to handle the higher amp draw of Spal fans
IMG_2121.JPG Powermaster 200 amp alternator PN 47864 with PN 186 65mm pulley Sent from my iPhone using ZR-1 Net Registry
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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02-09-2019
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#3 |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: CHMSL LED mod
I am not surprised.
My current alternator was beefed up when rebuilt last year to 145 amp. I have been contemplating a billet alternator putting out 200 amp. Guess I should spread out mod works. Wouldn't know what to do when done... Been also thinking about coilover FX3 vs. Van Steele 2 way adjustable coilovers. We shall see... |
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02-09-2019
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#4 |
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Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: CHMSL LED mod
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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02-09-2019
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#5 | |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: CHMSL LED mod
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02-09-2019
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#6 |
 
Join Date: Aug 2012
Location: Ellicott City, MD
Posts: 1,713
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Re: CHMSL LED mod
Guilty as charged but mods not my fault, Wazoo started it................
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Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa |
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02-09-2019
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#7 | |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: CHMSL LED mod
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director  91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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02-10-2019
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#8 | |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: CHMSL LED mod
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02-10-2019
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#9 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: CHMSL LED mod
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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02-10-2019
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#10 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: CHMSL LED mod
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 I did this for safety really. One time in a 14 month period my GMC Jimmy was rear ended 3 times in 15 months. The Vette is so low and I am always waiting on the Azz hat to jump into my lane daily at least I have done everything possible for them to see me including running DRLs on ALL my cars. My forum bud Dom hates this model because it makes a little cross for a light and honestly I get that but I agree it would have looked a little better if they had added one more LED to the top second and second from the bottom row which would have rounded it a little more. The brightness even in full AZ sun is outstanding! GC
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 02-10-2019 at 02:19 PM. |
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Hybrid Mode
