Ford Truck Enthusiasts Forums

Notices
2017 - 2022 Super Duty The 2017-2022 Ford F250, F350, F450, F550 & F600 Super Duty Pickup and Chassis Cab
Sponsored by:
Sponsored by: CARiD

AC outlets 83V

Thread Tools
 
Search this Thread
 
Old Dec 1, 2018 | 03:27 PM
Share
  #1  
adamsfbay's Avatar
adamsfbay
Thread Starter
|
Mountain Pass
Joined: Apr 2018
Posts: 143
Likes: 0
From: SF Bay Area
AC outlets 83V
I measured the in-cab outlets and found they were both 83V is this normal?
 
Reply
0
Old Dec 1, 2018 | 03:48 PM
Share
  #2  
skanj0's Avatar
skanj0
More Turbo
Joined: Jan 2010
Posts: 642
Likes: 14
Originally Posted by adamsfbay
I measured the in-cab outlets and found they were both 83V is this normal?
83v with the motor running? That cant be right. Should be between 115v and 120v.
 
Reply
0
Old Dec 1, 2018 | 04:01 PM
Share
  #3  
Section179's Avatar
Section179
Fleet Mechanic
Joined: Apr 2018
Posts: 1,502
Likes: 165
Are I you using a digital voltmeter set to AC?
 
Reply
0
Old Dec 1, 2018 | 04:10 PM
Share
  #4  
DSLTRK60's Avatar
DSLTRK60
Fleet Mechanic
10 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2015
Posts: 1,641
Likes: 507
From: Phelan CA
The inverter probably uses pwm or pulse width modulation to synthesize a sine wave. In other words it's not a pure wave inverter.

Common multimeters are designed to measure the rms voltage of a clean sine wave only, hence the low reading of 83 volts.

The only way to know is to look at the wave form with an occilloscope.
 
Reply
0
Old Dec 1, 2018 | 04:14 PM
Share
  #5  
DSLTRK60's Avatar
DSLTRK60
Fleet Mechanic
10 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2015
Posts: 1,641
Likes: 507
From: Phelan CA

Here is what pwm looks like. The main thing is the area under the waveform(power) is equivalent to the sine wave.
 
Reply
0
Old Dec 1, 2018 | 06:27 PM
Share
  #6  
BillyE's Avatar
BillyE
Fleet Mechanic
5 Year Member
Liked
Loved
Community Favorite
Joined: Feb 2018
Posts: 1,592
Likes: 204
Use a “true rms” meter and you should get 110-120. It sounds like you’re using an averaging meter.
 
Reply
0
Old Dec 1, 2018 | 06:51 PM
Share
  #7  
adamsfbay's Avatar
adamsfbay
Thread Starter
|
Mountain Pass
Joined: Apr 2018
Posts: 143
Likes: 0
From: SF Bay Area
Thanks, makes sense (re:averaging)
 
Reply
0

Trending Topics

Old Dec 2, 2018 | 06:55 AM
Share
  #8  
crewzer's Avatar
crewzer
Logistics Pro
25 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
Exclamation
The OEM inverter output is MSW (modified sine wave or modified square wave; take your pick). It's not a true sine wave (TSW), nor is it PWM.

Here are links to previously posted waveform pictures:
Here are links to previous discussions about the inverter and associated operational problems:HTH,
Jim crewzer
 
Reply
0
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Dec 2, 2018 | 11:46 AM
Share
  #9  
DSLTRK60's Avatar
DSLTRK60
Fleet Mechanic
10 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2015
Posts: 1,641
Likes: 507
From: Phelan CA
Damn that's a pretty rough waveform.
 
Reply
0
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Heating and AC issues
Andrew Taufen
1999 - 2016 Super Duty
2
Mar 20, 2019 10:19 AM
400w/350w AC power
delorenzomp
2017 - 2022 Super Duty
7
Dec 16, 2018 04:57 PM
Low side or Suction side AC port location
rblank
6.2L V8
0
May 18, 2017 10:18 AM
ac port
stahlzee
1997 - 2006 Expedition & Navigator
2
Jul 2, 2007 11:50 AM
A/C questions
lestenson
1973 - 1979 F-100 & Larger F-Series Trucks
1
Oct 17, 2004 08:56 PM
Back to Subforum
2017 - 2022 Super Duty
View Next Unread
Xplan for truck purchases in my company name?




Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 04:41 PM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE