Posts: 1,295
Threads: 186
Joined: May 2014
Reputation:
6
Location: UK
Car Model/Spec: Peugeot 306 2.0 HDI
Thanks: 29
Given 17 thank(s) in 17 post(s)
Well as you might know I was having the odd problem with lights flickering and dimming. I decided to get my self a voltmeter that goes in the ciggy lighter (Has a USB charger, and temp sensor as well) 
Anyway, Using the voltmeter I took some measurements before and after installing a large cable from the alternator and the battery positive.
(No cable on idle)
Lights on - 14.5v
Heater on - 14.4v
Lights + Heater - 14.3v
(With cable on idle)
Lights on - 14.5v
Heater on - 14.5v
Lights + Heater - 14.5v
Seems to have made a difference to the headlight brightness as well. I have two more cables to do the earths with soon as well which will make a difference as well hopefully.
I didn't take into account in this test loading it up more like heated rear window, window wipers, my audio system etc so the gains would be more noticeable there as well.
Thought I would share my findings because I have noticed brighter headlights being the best positive of this this whole thing
very good for winter dark night driving
Jack
Posts: 1,484
Threads: 101
Joined: Jun 2015
Reputation:
2
Location: Oxfordshire
Car Model/Spec: 306HDi 90 LX
Thanks: 13
Given 28 thank(s) in 28 post(s)
good update.
another method, mini multi-meter across the battery terminals under similar tests. (maybe?)
It goes, it stops (as reqd). 
Hate Housework!
Posts: 1,295
Threads: 186
Joined: May 2014
Reputation:
6
Location: UK
Car Model/Spec: Peugeot 306 2.0 HDI
Thanks: 29
Given 17 thank(s) in 17 post(s)
29-12-2015, 11:16 PM
(This post was last modified: 29-12-2015, 11:25 PM by JTaylor2005.
Edit Reason: Misspelled word
)
Yeah I have an analogue one but its a pain to read. To be honest I don't doubt the reading of the volt meter I have as tbf its always sitting at 14.4v when idle and no load on which sound spot on
Posts: 13,881
Threads: 476
Joined: Dec 2011
Reputation:
81
Location: Ipswich
Car Model/Spec: 306 Rallye
Thanks: 4
Given 104 thank(s) in 102 post(s)
Defintitely some good research going on here. On the 1.8 the negative battery terminal was loose. Before it went if you put the headlights on it would cut everything else out for 2 seconds including the ecu. Dash off music off etc. Also putting full beam on would do the same thing. Its definitely a worthy upgrade!
Posts: 908
Threads: 70
Joined: May 2013
Reputation:
10
Location: Bedford
Car Model/Spec: HDi Estate
Thanks: 4
Given 9 thank(s) in 9 post(s)
This is the 'Car Audio Big Three' right?
https://www.youtube.com/watch?v=5E2Zuw03jCQ
Always worth doing! Not done mine yet mind, but have some nice cable handy now...
Posts: 19,854
Threads: 581
Joined: Dec 2011
Reputation:
195
Location: Bournemouth
Car Model/Spec: Supercharged 306 GTi6
Thanks: 36
Given 82 thank(s) in 78 post(s)
I replaced my battery leads and earth straps and the difference was night and day. Issue is especially with the battery leads is they flex over time and the strands break at the connections. When I removed my old one, I'd say about half the strands weren't actually connected so we're useless.
Proper quality cable, proper quality crimps that have actually been crimped properly and maybe even solder filled for good measure and you will see a difference.
Team Eaton
1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft
Posts: 908
Threads: 70
Joined: May 2013
Reputation:
10
Location: Bedford
Car Model/Spec: HDi Estate
Thanks: 4
Given 9 thank(s) in 9 post(s)
Reminds me, I've just replaced my positive clamp, the quick release part of the Peugeot clamp had been bodged into a cheap fitting, worked fine, but obviously electrons not getting where they want to go as fast, Halfords have some pretty meaty clamps, £7 a piece iirc so got one of those.
Posts: 1,295
Threads: 186
Joined: May 2014
Reputation:
6
Location: UK
Car Model/Spec: Peugeot 306 2.0 HDI
Thanks: 29
Given 17 thank(s) in 17 post(s)
Quick question. When I turn my ignition to the second stage I hear a relay click. It stays on for about 5 seconds. The voltage is around 11.2v then after the 5 seconds is up the voltage jumps back up to 12.2v.
Do you think this is the glow plugs?
Posts: 13,881
Threads: 476
Joined: Dec 2011
Reputation:
81
Location: Ipswich
Car Model/Spec: 306 Rallye
Thanks: 4
Given 104 thank(s) in 102 post(s)
(30-12-2015, 06:10 PM)JTaylor2005 Wrote: Quick question. When I turn my ignition to the second stage I hear a relay click. It stays on for about 5 seconds. The voltage is around 11.2v then after the 5 seconds is up the voltage jumps back up to 12.2v.
Do you think this is the glow plugs?
seeing as its a hdi its a pretty good guess!
Posts: 7,825
Threads: 465
Joined: Dec 2011
Reputation:
114
Location: Cullompton Devon
Car Model/Spec: Vauxhall
Thanks: 1
Given 98 thank(s) in 92 post(s)
(30-12-2015, 06:10 PM)JTaylor2005 Wrote: Quick question. When I turn my ignition to the second stage I hear a relay click. It stays on for about 5 seconds. The voltage is around 11.2v then after the 5 seconds is up the voltage jumps back up to 12.2v.
Do you think this is the glow plugs?
yes glow plugs or fuel pump priming ...
Posts: 1,484
Threads: 101
Joined: Jun 2015
Reputation:
2
Location: Oxfordshire
Car Model/Spec: 306HDi 90 LX
Thanks: 13
Given 28 thank(s) in 28 post(s)
2 Q's, does the wire need to be that thick, & is that fuse necessary?
It goes, it stops (as reqd).
Hate Housework!
Posts: 1,295
Threads: 186
Joined: May 2014
Reputation:
6
Location: UK
Car Model/Spec: Peugeot 306 2.0 HDI
Thanks: 29
Given 17 thank(s) in 17 post(s)
If its the video your looking at the size of the cable in then most likely not. I just got a £5.50 36" battery cable from halfords and modified the alternator terminal plastic surround to make it fit haha
Posts: 7,825
Threads: 465
Joined: Dec 2011
Reputation:
114
Location: Cullompton Devon
Car Model/Spec: Vauxhall
Thanks: 1
Given 98 thank(s) in 92 post(s)
i only replaced the battery earth-gearbox and gearbox-chassis with 35mm cables that alone help my car no end 
Posts: 10,864
Threads: 117
Joined: Dec 2011
Reputation:
119
Location: Southampton
Car Model/Spec: 306 HDi and friends
Thanks: 13
Given 106 thank(s) in 106 post(s)
(30-12-2015, 06:42 PM)Magenta Sunset Wrote: 2 Q's, does the wire need to be that thick, & is that fuse necessary?
Depends if you're installing a chronic audio set up or not. If you just want to refresh your earths and power cables oem thickness will be fine.
Posts: 149
Threads: 4
Joined: May 2015
Reputation:
0
Location: Stroud
Car Model/Spec: diablo hdi
Thanks: 2
Given 2 thank(s) in 2 post(s)
Country: 
35mm welding cable. Generally a lot cheaper than anything marketed for automotive use.
Same applies for vinyl (wierdly), its peanuts from a signwriters supplier, but as soon as someone tries to sell it 'for cars' the same stuff triples in value
As for light:voltage. The table on this page shows the reduction in lumens for a given voltage loss
http://www.danielsternlighting.com/tech/...elays.html
So its well worth checking your wiring and uprating, if needs be, to ensure a full 14+v is getting to the lamps
Posts: 1,484
Threads: 101
Joined: Jun 2015
Reputation:
2
Location: Oxfordshire
Car Model/Spec: 306HDi 90 LX
Thanks: 13
Given 28 thank(s) in 28 post(s)
thanks guys!
It goes, it stops (as reqd).
Hate Housework!
Posts: 1,295
Threads: 186
Joined: May 2014
Reputation:
6
Location: UK
Car Model/Spec: Peugeot 306 2.0 HDI
Thanks: 29
Given 17 thank(s) in 17 post(s)
Well today I started my car. Drove for about 2 minutes and the voltage was hitting 14.9v which seems pretty high considering it should be 14.4v Do you think this is excessive or should it be okay? If it seems high I will probably just get a voltage regulator and change that on the alternator?
|
