long and short pig tail fuse boxes..whats the dif?

[jaroslav]

Quick question...other than the obvious.....are there any significant differences between the short and long pigtail fuse boxes... are all the connectors and fuse positions the same?

My early 71 should have a long one but it has a short version??? Perhaps the whole harness is a later version.... I want to buy one of the new motorsport boxes and would prefer a longer one as I expect it will clean up the wires in the dash and make a neater radio install.

Thanx

[Arne]

I have cars with both styles. As far as I have been able to see, the pigtail length is the difference. But the dash harnesses are different to match. So perhaps your car has the later dash harness as well.

I don't think there is any reason you couldn't use the long-tail box, though, if you think it will fit better.

[=Enigma=]

So for the record, which years have the short and which the long.

[26th-Z]

According to my records 25410-E4600, assy - fuse block, was good up to 12/70 and was replaced begining 1/71 with 25410-E8600 which was good up to 7/73 when it was replaced with 25410-E8800. The long tail fuse block is 25410-E4600. My cars have long tail fuse blocks

[Arne]

I concur. My yellow car (10/70) has the long-tail box. Both my red car (7/71) and the parts car (4/71) came with short-tail boxes.

[kinfish]

26th-Z nailed it with part numbers. Based on dates it appears that Series I 240's had long tail fuse blocks and Series II picked p the short tail. Correct me if I am wrong.

[Carl Beck]

According to my records 25410-E4600, assy - fuse block, was good up to 12/70 and was replaced begining 1/71 with 25410-E8600 which was good up to 7/73 when it was replaced with 25410-E8800. The long tail fuse block is 25410-E4600. My cars have long tail fuse blocks

Hi Chris (everyone):

My Parts Fiche shows:

25410-E4600 Assy Fuse Block "Up-To" 12/70

25410-E8300 Assy Fuse Block "From" 01/71

25410-E8800 Assy Fuse Block "Up-To" 07/73

As I understand it - that means that the E8300 number could have been superceded at any point between 01/71 and 07/73 by the E8800 number. {"Up To" gives you the end date - where "From" provides the start date}

25410-N3600 Assy Fuse Block "From" 08/73

Would mean that the E8800 number was replaced with N3600 starting as of 08/73.

I don't show any E8600 number (25410-E8600)

My Fiche is as Revised "December 1979"....

FWIW,

Carl B.

Clearwater, FL

[Carl Beck]

Quick question...other than the obvious.....are there any significant differences between the short and long pigtail fuse boxes... are all the connectors and fuse positions the same?

According to the Service Bulletin - for the Series II Datsun 240-Z on US and Canada cars.

- - - quote - -- -

The head lamp harness has been changed from the previous design. The dual system circuit now includes a battery switch in place of the former ground switch to prevent electro-chemical attachment on the lamp terminals while the switch is left "OFF". In accordance with this improvement, the head lamp cover has been eliminated on USA and Canada models.

Affected Changes

Fuse block ...... Internal connection changed (one lead wire added to harness)

Light Switch.... One lead wire added to harness

Harness.... Instrument and heater circuits changed

Combination switch

Head lamp and wiper - ground circuits have been separated. As the result, one lead wire has been added to the harness.

- - - end quote - - - -

Looking at the schematics..... For the Series II cars - there is one additional Red Wire running between the fuse block and the combination switch. All other connections and fuses are the same.

So it would seem that you can use the newer fuse block - in the older cars.... but you couldn't use the older fuse block in the newer cars.

FWIW,

Carl B.

[Arne]

Ahh! I haven't really looked at how my Series 2 cars were wired. So it sounds like the headlights on the Series 2 cars no longer switch the ground to activate the headlight circuits, but switch the power just like most other cars. Good to know.

[Carl Beck]

Hi Arne:

It would seem to be so... The good news was they were now switching the power.... but the bad news was they were still running the full power though the switch... instead of using the switch to toggle a relay. Even that wouldn't have been so bad - if it was only the headlight switch... but the Combination Switch was complex and EXPENSIVE... not to mention the Fuse Box itself destine to melt down...

[Arne]

Yup, roger that. I've got some really nice spares from the 4/71 parts car, both a good fusebox and a great combo switch. But I'll put relays on the red car anyway.

[GreenZZZ]

(cross posted) Link to a photo of a new B5410-E8800

new fuse block