1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

Love the truck hate the charging system. Need some help!

Old Mar 14, 2010 | 01:35 PM
  #11  
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Will it hurt to run it with the heater relays unhooked. Till I find one.
 
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Old Mar 14, 2010 | 06:24 PM
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Why not just wire in a relay from the parts store?
 
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Old Mar 14, 2010 | 08:13 PM
  #13  
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Originally Posted by RSWORDS
Why not just wire in a relay from the parts store?
thats exactly what i would do if i couldnt find one
 
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Old Mar 14, 2010 | 10:18 PM
  #14  
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Got a regulator that woorks guys. Turns out the cheeper reg has no paint on it and so far is charging perfect. Shouldn't brag probably jinx myself .Running with my heater relays unhooked still. At least it's warm outside. Probably won't need em till next winter.I hope!! Does the parts house sell relays that large I mean they look realy heavy duty and take heavy gauge wire.
 

Last edited by martymc81; Mar 14, 2010 at 10:25 PM.
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Old Mar 14, 2010 | 10:47 PM
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Originally Posted by RSWORDS
Why not just wire in a relay from the parts store?
The problem with using a standard relay is that a standard relay is spec'ed to around 30 amps; the grid heaters are more than that. 50 amps a piece, right? You'd probably get a voltage drop across the relay just because it's not big enough.
 
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Old Mar 14, 2010 | 10:58 PM
  #16  
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Ya I didn't think I had ever seen an aftermarket relay that large. What do u think about 2nd gen relays. They are still available. From the dealership.
 
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Old Mar 20, 2010 | 01:09 PM
  #17  
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Think starter relay !!
 
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Old Mar 21, 2010 | 01:31 PM
  #18  
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ON THOSE EXTERNAL VOLTAGE REGS IF YOU DONT USE THE PROPER, OR GOOD TERMINALS AND YOU GET A LOOSE CONNECTION THE CUTTING IN AN OUT ON THE FIELD WIRE WILL BURN OUT THOSE CRAPPY NAPA ONES ...I GUESS HIGH RESISTANCE FROM A ARCING TERMINAL WILL DO IT IN....ANOTHER POST SUGGESTED GETTING A TERMINAL FROM THE HEAD LIGHT HARNESS PLUG FROM ANTHER TYPE OF TRUCK......I JUST SOLDERED MINE ON THE BENCH WITH SOME # 12 WIRE AND THIS ONE HAS LASTED ABOUT A YEAR
 
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Old Mar 21, 2010 | 01:40 PM
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Originally Posted by Begle1
The problem with using a standard relay is that a standard relay is spec'ed to around 30 amps; the grid heaters are more than that. 50 amps a piece, right? You'd probably get a voltage drop across the relay just because it's not big enough.
ford external/firewall mounted starter relay will work great.

Also you can try rebuilding yours....
http://dens-site.net/Dodge_CTD/Grid_Heater_Relays/
 

Last edited by RSWORDS; Mar 21, 2010 at 01:45 PM.
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Old Mar 23, 2010 | 04:36 PM
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IF YOU GOT AN ELECTRICAL PARTS STORE NEARBY TRY AN ALLEN BRADLEY SOLID STATE RELAY 50 AMP WITH A 3~ 32 V COIL SINGLE POLE PART# 700-SH50GZ24 THEY ARE VERY COMPACT AND DURABLE THEY ARE LIKE 25-30$ OR CHECK EBAY
 
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