Pajero 4WD Club of Victoria Public Forum Pajero 4WD Club of Victoria Public Forum

Go Back   Pajero 4WD Club of Victoria Public Forum > General Information > Electrical / Radios

Electrical / Radios Discussion of electrical systems and accessories.

Reply
 
Thread Tools Display Modes
  #1  
Old 1 Week Ago
ErOsion9o ErOsion9o is online now
Junior Member
 
Join Date: May 2018
Location: Perth
Posts: 5
Default Wiring up a DCDC charger

Hi members,

Ive just installed a Supercheap Ridge Ryder 20a DCDC charger in the rear seat well
of my NT pajero.

I ran 4gauge 100amp cable from the main battery to the back, from there i used 4gauge to connect the aux battery to the dcdc charger and 6gauge 50amp for the negatives. All positive connections have a 100/50A fuses. The fuses are not blown.

Upon switching it on for the first time, the charger came on for about 5 seconds and hasnt been back on since. The main battery is outputting over 13.5 volts (12.8 is required for the unit to work).

The only thing i havent done is run a negative shared cable from the main battery to dcdc/aux battery. Is this required? I have a good solid earth connection for the charger and the aux battery.
Reply With Quote
  #2  
Old 1 Week Ago
Keithyv's Avatar
Keithyv Keithyv is online now
Member
 
Join Date: May 2018
Location: Perth
Posts: 181
Default

You should not need separate negative feeds no - earthing to the chassis should be fine.

Where are you measuring the 13.5 volts? right at the main battery or at the input to the DC-DC charger? The only thing could be you are getting a severe voltage drop under load but even then the DC-DC charger SHOULD kick in and then kick straight back out again. Maybe it's just faulty?

You've tried all this with the vehicle running? that should bring the main battery voltage up to over 14 V
__________________
2014 NW MY14 3.2 DID GLX-R. Champagne in colour!
Reply With Quote
  #3  
Old 1 Week Ago
ErOsion9o ErOsion9o is online now
Junior Member
 
Join Date: May 2018
Location: Perth
Posts: 5
Default

Quote:
Originally Posted by Keithyv View Post
Where are you measuring the 13.5 volts? right at the main battery or at the input to the DC-DC charger? The only thing could be you are getting a severe voltage drop under load but even then the DC-DC charger SHOULD kick in and then kick straight back out again. Maybe it's just faulty?
I have just tested to voltage on the DCDC charger whilst the car was running. On the DC in+ and the negative output i was getting a reading of .04 V. On main battery it was reading over 14v.
Reply With Quote
  #4  
Old 1 Week Ago
Keithyv's Avatar
Keithyv Keithyv is online now
Member
 
Join Date: May 2018
Location: Perth
Posts: 181
Default

.04? that's not good...
__________________
2014 NW MY14 3.2 DID GLX-R. Champagne in colour!
Reply With Quote
  #5  
Old 1 Week Ago
ErOsion9o ErOsion9o is online now
Junior Member
 
Join Date: May 2018
Location: Perth
Posts: 5
Default

Does that mean possible faulty charger?
Reply With Quote
  #6  
Old 1 Week Ago
nj swb's Avatar
nj swb nj swb is offline
Resident
 
Join Date: Jun 2007
Location: Adelaide
Posts: 4,732
Default

If you're getting 0.04 V on the DC + input then you have a wiring problem. You need to chase back along your +ve supply until you find more volts, then figure out what stopped them getting through.

Unless I've misunderstood your post?
__________________
NT Platinum. DiD Auto with 265/70R17 MT51, Lift, Lockers, 3.15 gears, LRA Aux tank, bullbar, winch, lights, lots of touring stuff. Flappy paddles. MMCS is gone!

Project: NJ SWB. 285/75R16 ST Maxx, 2" OME suspension, 2" body lift, ARB 110, 120l tank, bullbar, scratches, no major dents. Fully engineered in SA. NW DiD & auto in place - a long way to go....
Reply With Quote
  #7  
Old 1 Week Ago
ErOsion9o ErOsion9o is online now
Junior Member
 
Join Date: May 2018
Location: Perth
Posts: 5
Default

Ive used pre-existing 4g cable that was once connected to a stereo amp rated at 100a. My assumption would be that the cable is damaged.

I will re-wire with 6b&s under the chassis. Hopefully this fixes the problem.

The only reason i am skeptical of it being a wiring issue is that the charger did turn on for ~5 seconds the first time i tested it. Could it be internal damage?

**after troubleshooting at lunch, i found the fuse near the main battery to be blown - i will replace after work and report back**

Last edited by ErOsion9o; 1 Week Ago at 03:59 PM.
Reply With Quote
  #8  
Old 1 Week Ago
denmonkey's Avatar
denmonkey denmonkey is online now
Member
 
Join Date: Oct 2017
Location: Newcastle NSW
Posts: 214
Default

Quote:
Originally Posted by ErOsion9o View Post
Ive used pre-existing 4g cable that was once connected to a stereo amp rated at 100a. My assumption would be that the cable is damaged.

I will re-wire with 6b&s under the chassis. Hopefully this fixes the problem.

The only reason i am skeptical of it being a wiring issue is that the charger did turn on for ~5 seconds the first time i tested it. Could it be internal damage?

**after troubleshooting at lunch, i found the fuse near the main battery to be blown - i will replace after work and report back**
Check all your work before you go slapping another fuse in. Run over your wires to make sure you don't have a short somewhere.
It's possible you may have done it during the install

I stuck on in my carvan a few weeks back and have had no issues with it .
I can confirm it requires the 12.8v to become active and start charging
Reply With Quote
  #9  
Old 1 Week Ago
Sparky3975 Sparky3975 is offline
Member
 
Join Date: Apr 2017
Location: Lynbrook, Vic
Posts: 194
Default

As has already been mentioned, check the resistance/continuity and shorts to earth on the existing cable? It may be an easy repair rather than running more cabling. Just ensure you have fused the cables correctly too. I recently installed a BCDC and mine is protected with 40Amp fuses in/out.
__________________
2005 NP Pajero Exceed DiD: Airtec snorkel, iDrive, Nudge bar with 24" Stedi light bar, Redarc's Ultimate Dual Battery setup, 2" MD King/Bilstein suspension combo, Flashlube catch can pro, Bridgestone D697 A/T's, Front/Rear RDA slotted disc rotors, Boo's bashplates.
Reply With Quote
  #10  
Old 6 Days Ago
ErOsion9o ErOsion9o is online now
Junior Member
 
Join Date: May 2018
Location: Perth
Posts: 5
Default

So the issue was a faulty 100a fuse, no signs of it being damaged or broken however upon testing another fuse, all is working.

Cheers, hope this helps someone in the future.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Where are people mounting their DCDC chargers with under bonnet dual battery? zoiks Electrical / Radios 7 09-12-17 11:28 PM
USB charger RUGGA Bits and Pieces 6 02-02-17 07:56 PM
12 pin trailer plug wiring for caravan fridge (AES/D+ wiring query) MickyD Electrical / Radios 5 29-07-15 11:32 PM
Wiring Aux. battery using DC to DC charger / isolator GHendo Electrical / Radios 45 28-04-15 10:36 PM
DC to DC charger or VSR? DiDExceed Electrical / Radios 3 15-10-11 06:20 PM


All times are GMT +10. The time now is 08:53 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.